The sum of profit this year + profit last year is not working correctly

most_profitable_vehicle.nut

function LeagueTable::GetMostProfitableVehicle_Val(company)
{
	if (GSCompany.ResolveCompanyID(company) != GSCompany.COMPANY_INVALID) {
		local company_scope = GSCompanyMode(company);
		local total_profits = GSList();
		local vehicle_list = GSVehicleList();
		if (vehicle_list.Count() == 0) return [ 0, { str = GetMostProfitableVehicle_ElementString(), p = [ -1 ] } ];

		vehicle_list.Valuate(GSVehicle.GetProfitThisYear);
		total_profits.AddList(vehicle_list);

		vehicle_list.Valuate(GSVehicle.GetProfitLastYear);
		foreach(vehicle in total_profits) {
			total_profits.SetValue(vehicle, (total_profits.GetValue(vehicle) + vehicle_list.GetValue(vehicle)));
		}
		return [ total_profits.GetValue(total_profits.Begin()), { str = GetMostProfitableVehicle_ElementString(), p = [ total_profits.Begin() ] } ];
	}

	return [ 0, { str = GetMostProfitableVehicle_ElementString(), p = [ -1 ] } ];
}

		foreach(vehicle, value in vehicle_list) {
			total_profits.SetValue(vehicle, (total_profits.GetValue(vehicle) + value));
		}