double ShipDesign::PerTurnCost(int empire_id, int location_id) const { return ProductionCost(empire_id, location_id) / std::max(1, ProductionTime(empire_id, location_id)); }
float BuildingType::PerTurnCost(int empire_id, int location_id) const { return ProductionCost(empire_id, location_id) / std::max(1, ProductionTime(empire_id, location_id)); }