======= Contracts Game Mechanics ======= The Game Mechanics section of the manual details the internal formula used in the game's calculations. This section of the manual uses pseudo-code and may not be 100% the same as the code in the game. The Game Mechanics part of the manual is mainly designed to be a reference for the frequently asked question, "Why do I get this rating when I do X, Y, Z?!" Usually, this answer involves many different variables, which this section of the manual demonstrates. **The game mechanics section of the manual shows [[https://idioms.thefreedictionary.com/seeing+how+the+sausage+gets+made|how the sausage gets made]]. So you really may want to avoid this portion of the manual if you enjoy the game.** ====== Variables ====== ^ Name ^ Description ^ ^ Name ^ Description ^ | **govPopulation** | This is the population of the contracting city or country. | | **govCalc** | The war status for the country, 1=Normal, 0=Limited, -1 War, -2 Total War. | | **year** | This is the game year. | | **Year_Built** | This is the year of the design. | | **Minimum_Bid_Score** | Minimum required bid score to be selected. | | **ContractPeriod** | How long the contract lasts. | | **Wealth_Index** | Wealth Index of the design. See [[gamemanual:references_vehicletypeimportance|this page.]] | | **Wealth** | See Wealth Index | | **Lobbying_Budget** | The weighted lobbying budget for your company | | **Max_Lobbying_Budget** | The maximum amount of lobbying budget that can be spent | | **contractUnitPriceMod** | Price mod for this type of contract as defined in the EngineContracts.xml file. | | **** | | | **Engine_Type_EngineSize** | Engine Size variable as defined in the EngineContracts.xml file. | | **Engine_Type_UnitNumbers** | This is a modifier variable for the number of units ordered for this type of contract as defined in the EngineContracts.xml file. | | **Engine_Type_FuelMOD** | Engine Fuel Economy variable as defined in the EngineContracts.xml file. | | **Engine_Type_HPMOD** | Engine horsepower variable as defined in the EngineContracts.xml file. | | **Engine_Type_torqueMOD** | Engine torque variable as defined in the EngineContracts.xml file. | | **Engine_Type_WidthMOD** | Engine width variable as defined in the EngineContracts.xml file. | | **Engine_Type_LengthMOD** | Engine length variable as defined in the EngineContracts.xml file. | | **Engine_Type_WeightMOD** | Engine weight variable as defined in the EngineContracts.xml file. | | **Engine_Type_unitPrice** | This modifier variable affects the unit price of this type of engine contract as defined in the EngineContracts.xml file. | | **** | | | **Type_Popularity** | This is the popularity value of this type of vehicle. | | **CarContractType_unitNumbers** | This is a modifier value for the number of units for this type of car contract as defined in the EngineContracts.xml file. | | **CarContractType_HPMOD** | Horsepower modifier value for this type of car contract as defined in the EngineContracts.xml file. | | **CarContractType_FuelMOD** | Fuel Economy modifier value for this type of car contract as defined in the EngineContracts.xml file. | | **cargoType** | This is the cargo importance rating for this vehicle type. | | **CarContractType_CargoMOD** | Cargo modifier value for this type of car contract as defined in the EngineContracts.xml file. | | **CarContractType_torqueMOD** | Torque modifier value for this type of car contract as defined in the EngineContracts.xml file. | | **CarContractType_WeightMOD** | Weight modifier value for this type of car contract as defined in the EngineContracts.xml file. | | **CarContractType_TopSpeedMOD** | Topspeed modifier value for this type of car contract as defined in the EngineContracts.xml file. | | **CarContractType_unitPrice** | Unit price modifier value for this type of car contract as defined in the EngineContracts.xml file. | | **RacingSeries_Funding_Value** | This is the racing funds variable for racing series as defined in the RacingSeries.xml file. | | **RacingSeries_Races** | This is the number of races a series runs in a season. | | **ex_1d002p_year99** | 1.002%%^%%(year-1899) | | **ex_1d005p_year99** | 1.005%%^%%(year-1899) | | **ex_1d008p_year99** | 1.008%%^%%(year-1899) | | **ex_1d01p_year99** | 1.01%%^%%(year-1899) | | **ex_1d015p_year99** | 1.015%%^%%(year-1899) | | **ex_1d02p_year99** | 1.02%%^%%(year-1899) | | **ex_1d025p_year99** | 1.025%%^%%(year-1899) | | **ex_1d03p_year99** | 1.03%%^%%(year-1899) | | **ex_1d035p_year99** | 1.035%%^%%(year-1899) | | **ex_1d04p_year99** | 1.04%%^%%(year-1899) | | **ex_1d06p_year99** | 1.06%%^%%(year-1899) | | | | ====== Fleet Contracts Specs ====== ===== Engine ===== ==== Displacement ==== //Land/Army EngineCC = (Random Number Between 0 And 5000) + 10000) * Engine_Type_EngineSize //Maritime/Navy EngineCC = (Random Number Between 0 And 10000) + 25000) * Engine_Type_EngineSize //Aero EngineCC = (Random Number Between 0 And 18000 + 12000) * Engine_Type_EngineSize ==== Unit Demand ==== if(EngineCC > 20000) EngineSizeUnitMod = 1000000 / EngineCC else EngineSizeUnitMod = (-0.123 * EngineCC) + 2500 if Land/Army Units = ((govPopulation/100000) + EngineSizeUnitMod*0.2 + Random Number Between 0 And EngineSizeUnitMod*0.8)) * govCalc + 1 else if Navy Units = ((govPopulation/1000000) + EngineSizeUnitMod*0.2 + Random Number Between 0 And EngineSizeUnitMod*0.8)) * govCalc + 1 else if Military Aero Units = ((govPopulation/250000) + EngineSizeUnitMod*0.2 + Random Number Between 0 And EngineSizeUnitMod*0.8)) * govCalc + 1 else if Civil Aero Units = ((govPopulation/200000) + EngineSizeUnitMod*0.2 + Random Number Between 0 And EngineSizeUnitMod*0.8)) + 1 else if Civil Maritime Units = ((govPopulation/750000) + EngineSizeUnitMod*0.2 + Random Number Between 0 And EngineSizeUnitMod*0.8)) + 1 Units = Units * Engine_Type_UnitNumbers UnitsPerMonth = Units / ContractPeriod if(UnitsPerMonth < 1) UnitsPerMonth = 1 ==== Fuel Consumption ==== fuelRand = Random Number Between 0 And 3 if Land/Army MPG = ((10 - (EngineCC/4000)) - fuelRand) * Engine_Type_FuelMOD * ex_1d002p_year99+3; else if Navy MPG =(( 10 - (EngineCC/12000)) - fuelRand)*Engine_Type_FuelMOD * ex_1d002p_year99+3; else if Aero MPG = ((10 - (EngineCC/3500)) - fuelRand) * Engine_Type_FuelMOD * ex_1d002p_year99+3; if(MPG < 4 || MPG > 200) MPG = -1; ==== Horse Power ==== if Land/Army HP = (Random Number Between 0 And (EngineCC/250)+((EngineCC/100)*ex_1d01p_year99)) * Engine_Type_HPMOD else if Navy HP = (Random Number Between 0 And (EngineCC/600)+EngineCC/200) *ex_1d015p_year99 * Engine_Type_HPMOD else if Aero HP = ((Random Number Between 0 And (EngineCC/250)+((EngineCC/70)*ex_1d005p_year99))) * Engine_Type_HPMOD else if Civil Ships HP = (Random Number Between 0 And (EngineCC/500)+EngineCC/200) *ex_1d005p_year99 * Engine_Type_HPMOD ==== Torque ==== if Land/Army torque = (15 + Random Number Between 0 And EngineCC/450)+(EngineCC/300) ) * ex_1d008p_year99 * Engine_Type_torqueMOD; else if Navy torque = (15 + Random Number Between 0 And EngineCC/370)+(EngineCC/500) ) * ex_1d008p_year99 * Engine_Type_torqueMOD; else if Aero torque = (20 + Random Number Between 0 And EngineCC/300)+(EngineCC/200) ) * ex_1d008p_year99 * Engine_Type_torqueMOD; ==== Torque ==== if Land/Army torque = (15 + Random Number Between 0 And EngineCC/450)+(EngineCC/300) ) * ex_1d008p_year99 * Engine_Type_torqueMOD; else if Navy torque = (15 + Random Number Between 0 And EngineCC/370)+(EngineCC/500) ) * ex_1d008p_year99 * Engine_Type_torqueMOD; else if Aero torque = (20 + Random Number Between 0 And EngineCC/300)+(EngineCC/200) ) * ex_1d008p_year99 * Engine_Type_torqueMOD; ==== Width ==== if Land/Army EngineWidth = (EngineCC/300 + 10) * Engine_Type_WidthMOD; else if Navy EngineWidth = (EngineCC/150 + 10)*Engine_Type_WidthMOD; else if Aero EngineWidth = (EngineCC/350 + 10)*Engine_Type_WidthMOD; ==== Length ==== if Land/Army EngineLength = (EngineCC / 300 + 12) * Engine_Type_LengthMOD; else if Navy EngineLength = (EngineCC / 150 + 12)*Engine_Type_LengthMOD; else if Aero EngineLength = (EngineCC / 200 + 12)*Engine_Type_LengthMOD; ==== Weight ==== if Land/Army Weight = (EngineCC / 11.5 + 100) * ex_1d008p_year99 * Engine_Type_WeightMOD; else if Navy Weight = (EngineCC / 5.5 + 500) * ex_1d008p_year99 * Engine_Type_WeightMOD; else if Aero Weight = (EngineCC / 10.0 + 50) * Engine_Type_WeightMOD; ==== Penalty, Unit Price, Signing Bonus ==== if Units < 50 bonusPenality = (ex_1d025p_year99 *30000) * (50.0/(Units)) if Land/Army Penalty = (ex_1d025p_year99 * EngineCC/50) * Units + 1 + bonusPenality; else if Military Navy Penalty = (ex_1d025p_year99 * EngineCC/10) * Units + 1 + bonusPenality; else if Military Aero Penalty = (ex_1d025p_year99 * EngineCC/30) * Units + 1 + bonusPenality; else if Civilian Aero Penalty = (ex_1d025p_year99 * EngineCC/80) * Units + 1 + bonusPenality; else if Civilian Ships Penalty = (ex_1d025p_year99 * EngineCC/80) * Units + 1+bonusPenality; if(Random Number Between 0 And 1 = 1 ) { basePrice = 0 if Easy Difficulty basePrice = 175; else if Normal Difficulty basePrice = 75 if Land/Army { UnitCosts = ((((105 +basePrice) * ex_1d025p_year99) + Random Number Between 0 And (130 + basePrice/1.25) * ex_1d02p_year99)) + EngineCC/200 + 1 + (bonusPenality/10)) Penalty = ((UnitCosts + EngineCC/200) /2.0) * Units + 1 + bonusPenality } else if Military Navy { UnitCosts = ((((305 + basePrice) * ex_1d025p_year99) + Random Number Between 0 And (200 +basePrice/1.25) * ex_1d02p_year99)) + EngineCC/50 + 1+(bonusPenality/10)) Penalty = ((UnitCosts + EngineCC/50)/0.5) * Units + 1 + bonusPenality } else if Military Aero { UnitCosts = ((((205 + basePrice) * ex_1d025p_year99) + Random Number Between 0 And (230 +basePrice/1.25) * ex_1d02p_year99)) + EngineCC/100 + 1 + (bonusPenality/10)) Penalty = ((UnitCosts+EngineCC/100)/1.5) * Units + 1 + bonusPenality } else if Civilian Aero { UnitCosts = ((((130 + basePrice) * ex_1d025p_year99) + Random Number Between 0 And (155 +basePrice/1.25) * ex_1d02p_year99)) + EngineCC/150 + 1 + (bonusPenality/10)) Penalty = ((UnitCosts+EngineCC/150)/2.0) * Units + 1 + bonusPenality } else if Civilian Ships { UnitCosts = ((((255 + basePrice) * ex_1d025p_year99) + Random Number Between 0 And (200 + basePrice/1.25) * ex_1d02p_year99)) + EngineCC/100 + 1+(bonusPenality/10)) Penalty = ((UnitCosts + EngineCC/100)/2.0) * Units + 1 + bonusPenality } if(Units > 1000) UnitCosts = (UnitCosts * 0.75) + (UnitCosts * 0.25 * (1000.0/(1000.0 + Units))) else UnitCosts = (UnitCosts * 0.875) UnitCosts = UnitCosts * contractUnitPriceMod; UnitCosts = UnitCosts * Engine_Type_unitPrice; SigningBonus = UnitCosts / (Random Number Between 0 And 10) + 10) * Units SigningBonus = SigningBonus * contractUnitPriceMod SigningBonus = SigningBonus * Engine_Type_unitPrice Penalty = Penalty + SigningBonus * Random Number Between 0 and 1.0 + 3.0 } ===== Vehicles ===== ==== Units ==== Units = (govPopulation * (0.002 + (0.0025 * Absolute Value of(govStatus*3) ))) * Type_Popularity + 1 Units = Units * CarContractType_unitNumbers if(warContract) Units = Units * 5 ==== Displacement ==== EngineCC = (Random Number Between 0 And (500) + 1000) * Wealth ==== Horse Power ==== if Military Contract HP = (Random Number Between 0 And (10)+(5 * ex_1d008p_year99)) * wealth * CarContractType_HPMOD else if Civilian Contract HP = (Random Number Between 0 And (15)+10) * ex_1d008p_year99 * wealth * CarContractType_HPMOD ==== Fuel Consumption ==== if(Military Contract) MPG = (14 - (wealth * 2)+ Random Number Between 0 And (4)) * CarContractType_FuelMOD + 3; else if(Civilian Contract) MPG = (20 - (wealth *1.75)+ Random Number Between 0 And (4)) * CarContractType_FuelMOD + 3; if(MPG < 4 OR MPG > 200) No fuel economy limit ==== Cargo ==== if(Military Contract) CargoReq = 200 + (Random Number Between 0 And (200) + 200) * (cargoType * 1.2) * CarContractType_CargoMOD else if(Civilian Contract) CargoReq = 200 + (Random Number Between 0 And (200) + 150) * (cargoType * 1.2) * CarContractType_CargoMOD ==== Torque ==== torque = (25 + (EngineCC/100)) * ex_1d005p_year99 * CarContractType_torqueMOD ==== Weight ==== Weight = (500 + (CargoReq / 50) + Random Number Between 0 And (300)) * ex_1d008p_year99 * CarContractType_WeightMOD ==== Top Speed ==== if( Year < 2021 ) topSpeed = ( (20 + ((year-1899)/3.5)) + Random Number Between 0 And (15 + ((year-1899)/2)) )* ex_1d005p_year99 * CarContractType_TopSpeedMOD else topSpeed = (40 + Random Number Between 0 And (80)) * ex_1d005p_year99 * CarContractType_TopSpeedMOD ==== Unit Price, Penalty, Signing Bonus ==== basePrice = 0 if Difficulty is Easy basePrice = 175 else if Difficulty Normal basePrice = 75 if(Military Contract) { UnitCosts = (((350 + basePrice) * ex_1d02p_year99) + Random Number Between 0 And ((50 + basePrice/1.25) * ex_1d02p_year99)) * (Wealth * 0.8 + 1) } else if(Civilian Contract) { UnitCosts = (((250 + basePrice) * ex_1d02p_year99) + Random Number Between 0 And ((100 + basePrice/1.25) * ex_1d02p_year99)) * (Wealth * 0.7 + 1) } if(UnitCosts > 1000) UnitCosts = (UnitCosts * 0.75) + (UnitCosts * 0.25 * (1000.0/(1000.0 + Units))) else UnitCosts = (UnitCosts * 0.875) UnitCosts = UnitCosts * contractUnitPriceMod UnitCosts = UnitCosts * CarContractType_unitPrice if(UnitCosts < 450) UnitCosts = 450 SigningBonus = UnitCosts/(Random Number Between 0 And (10) + 10) * Units Penalty = Penalty + SigningBonus * RandomNumber->randDblExc(1.0) + 0.5 Penalty = Penalty + ((ex_1d02p_year99 * EngineCC/50) * Units) + 1 SigningBonus = SigningBonus * contractUnitPriceMod SigningBonus = SigningBonus * CarContractType_unitPrice ====== Generate Racing Contracts ====== ===== Vehicles ===== Racing series restrictions define displacement, fuel, induction, cylinder, vehicle types, etc. ==== Signing Bonus, Penalties, Unit Costs ==== SigningBonus = ((2000*ex_1d03p_year99)+(5000*RacingSeries_Funding_Value*ex_1d06p_year99)) * (Random Number Between (0 And 1.0)+0.5) Penalty = SigningBonus * (Random Number Between (0 And 3.0)+2.0) if Difficulty = Easy UnitCosts = (3000*ex_1d025p_year99) * (RacingSeries_Funding_Value/5.0 +1) else if Difficulty = Normal UnitCosts = (2000*ex_1d025p_year99) * (RacingSeries_Funding_Value/6.0 +1) else if Difficulty = Hard or Nightmare UnitCosts = (1000*ex_1d025p_year99) * (RacingSeries_Funding_Value/7.0 +1) ==== Units ==== Units = ((RacingSeries_Races) * RacingSeries_Funding_Value) + 10; ==== Minimum HP ==== MinHP = (100+(2*(year-1900))) ==== Lateral G ==== Lateral_G = 1 + (0.0005 * (year-1900)) ==== Top Speed ==== Top_Speed = 100 + (2 * (year-1900)) ===== Engines ===== Displacement, fuel, induction, and cylinder types defined by racing series restrictions. ==== Signing Bonus, Penalties, Unit Costs ==== SigningBonus = ((1000*ex_1d03p_year99)+(2500*RacingSeries_Funding_Value*ex_1d06p_year99)) * (Random Number Between (0 And 1.0)+0.5) Penalty = SigningBonus * (Random Number Between (0 And 3.0)+2.0) if Difficulty = Easy UnitCosts = (3000*ex_1d02p_year99) * (RacingSeries_Funding_Value/5.0 + 1) else if Difficulty = Normal UnitCosts = (2500*ex_1d02p_year99) * (RacingSeries_Funding_Value/6.0 + 1) else if Difficulty = Hard or Nightmare UnitCosts = (1500*ex_1d02p_year99) * (RacingSeries_Funding_Value/7.0 + 1) ==== Units ==== Units = ((RacingSeries_Races * 3.0) * RacingSeries_Funding_Value) + 5; ==== Minimum HP ==== Min_HP = (100+(2*(year-1900))); ====== Contract Winner Selection ====== ===== Max Bid Price ===== if Vehicle Contract maxBid = ((500 * ex_1d03p_year99) + Random Number Between 0 and (250 * ex_1d03p_year99)) * (Wealth_Index * .75) else if( Engine Contract ) maxBid = (((550 * ex_1d03p_year99) + Random Number Between 0 And (550 * ex_1d04p_year99)) + ( HP/(20 * ex_1d02p_year99) ) + 1) else maxBid = (((550 * ex_1d035p_year99) + RandomNumber Between 0 And (550 * ex_1d04p_year99)) + 1) } ===== Minimum Bid Score ===== If Only One Bid Min_Bid_Mod = 1.6 If Only Two Bids Min_Bid_Mod = 1.3 If Only Three Bids Min_Bid_Mod = 1.1 If More Than Three Bids Min_Bid_Mod = 0 Minimum_Bid_Score = Minimum_Bid_Score * Min_Bid_Mod; ===== Vehicle Bid ===== if(Lobbying Effectiveness > 60) { lobbyMod = (Lobbying Budget / Max_Lobbying_Budget } else { lobbyMod = 0 } if(lobbyMod >= 1.5) { lobbyMod = 1.499; } if Vehicle Contract { if( (Year - Year Built)> 6) { ageMod = 7 / (Year - Year Built); } else { ageMod = 1; } if Racing Contract { BuyerRating = (((Spec_HP - ContractRequirements_HP)*2.5) + (Spec_Fuel - ContractRequirements_FuelConsumption) + ((ContractRequirements_Weight - Spec_Weight)/50.0) + ((Spec_Cargo - ContractRequirements_CargoSpace/10.0)) + (Rating_Overall * 10) + (Rating_Cargo) + ((Spec_Torque - ContractRequirements_Torque)*2.5) + ((Spec_TopSpeed - ContractRequirements_TopSpeed)*3.5) + (Spec_LateralG - ContractRequirements_LateralG)*3 + (Rating_Quality*1) + (Rating_Dependability*10))/((Unit_Bid_Price^0.25)+1)*(1.5-lobbyMod)) } else { BuyerRating = (((Spec_HP - ContractRequirements_HP)/2.0) + (Spec_Fuel - ContractRequirements_FuelConsumption) + ((ContractRequirements_Weight - Spec_Weight)/100.0) + ((Spec_Cargo - ContractRequirements_CargoSpace/1.5)) + (Rating_Overall * 20) + (Rating_Cargo*15) + ((Spec_Torque - ContractRequirements_Torque)/2.0) + ((Spec_TopSpeed - ContractRequirements_TopSpeed)/3.5) + (Spec_LateralG - ContractRequirements_LateralG) + (Rating_Quality*25) + (Rating_Dependability*30))/((Unit_Bid_Price^0.81)+1)*(1.5-lobbyMod) } BuyerRating = BuyerRating * ageMod; Whoever has the highest buyer rating wins the contract. ===== Engine Bid ===== if(Lobbying Effectiveness > 60) { lobbyMod = (Lobbying Budget / Max_Lobbying_Budget } else { lobbyMod = 0 } if(lobbyMod >= 1.5) { lobbyMod = 1.499; } if( (Year - Year Built) > 6) { ageMod = 7 / (Year - Year Built); } else { ageMod = 1; } if(lobbyMod == 1.5) { lobbyMod = 1.499; } if Racing Contract { BuyerRating = (((HP - ContractRequirements_HP)*2) + ((ContractRequirements_EngineWeight - Weight)/2.0) +((Torque - ContractRequirements_Torque)*2) + (FuelConsumption - ContractRequirements_FuelConsumption) + (Overall_Rating * 5) + (EngineReliability_Rating * 5) + (Fuel_Rating * 5) + (Power_Rating * 5) ) /((UnitBid^0.25)+1)*(1.5-lobbyMod) } else { BuyerRating = (((HP - ContractRequirements_HP)/2.0) + ((ContractRequirements_EngineWeight - Weight)/10.0) +((Torque - ContractRequirements_Torque)/2.0) + (FuelConsumption - ContractRequirements_FuelConsumption) + (Overall_Rating * 15) + (EngineReliability_Rating * 15) + (Fuel_Rating * 10) + (Power_Rating * 10) + (Smoothness_Rating * 10)) /((UnitBid^0.81)+1)*(1.5-lobbyMod) } BuyerRating = BuyerRating * ageMod; Whoever has the highest buyer rating wins the contract. ===== Chassis Bid ===== if(Lobbying Effectiveness > 60) lobbyMod = (Lobbying Budget / Max_Lobbying_Budget else lobbyMod = 0 if(lobbyMod >= 1.5) lobbyMod = 1.499; if( (Year - Year Built) > 6) { ageMod = 7 / (Year - Year Built) } else { ageMod = 1 } if Racing Contract { BuyerRating = (((ChassisMaxEngineLength+ChassisMaxEngineWidth)-ChassisWeightKG) + Strength_Rating*1.25 + Comfort_Rating + (Performance_Rating * 25) + Dependability_Rating*2)/((UnitBid^0.25)+1)*(1.5-lobbyMod) } else { BuyerRating = ((((ChassisMaxEngineLength*2)+(ChassisMaxEngineWidth*2))) + Strength_Rating + Comfort_Rating*2 + Performance_Rating*2 + (Dependability_Rating*4)+Overall_Rating*3)//((UnitBid^0.81)+1)*(1.5-lobbyMod) } BuyerRating = BuyerRating * ageMod Whoever has the highest buyer rating wins the contract. ===== Gearbox Bid ===== if(Lobbying Effectiveness > 60) lobbyMod = (Lobbying Budget / Max_Lobbying_Budget else lobbyMod = 0 if(lobbyMod >= 1.5) lobbyMod = 1.499; if( (Year - Year Built) > 6) { ageMod = 7 / (Year - Year Built) } else { ageMod = 1 } if Racing Contract { BuyerRating = (((Overall_Rating*1.5+(Comfort_Rating*0.25))-Weight) + Reliability_Rating*2 + (Performance_Rating*15) + (FuelConsumption_Rating*2) + Power_Rating*5+(MaxTorqueInput*2.25))/((UnitBid^0.25)+1)*(1.5-lobbyMod) } else { BuyerRating = (((Overall_Rating*2.5+(Comfort_Rating*2.25))-Weight*2.5) + Reliability_Rating*1.5 + (Performance_Rating) + (FuelConsumption_Rating*2) + Power_Rating+(MaxTorqueInput*0.05))/((UnitBid^0.81)+1)*(1.5-lobbyMod) } BuyerRating = BuyerRating * ageMod Whoever has the highest buyer rating wins the contract.