Структура Таксопарк, вычислить общую стоимость таксопарка

struct Autombile
{
    enum Type { taxi, microbus, limuzine; };
    Automobile(void) = default;
    Automobile(Automobile::Type t, unsigned cap, unsigned cst, unsigned exp) : type(t), passenger_capacity(cap), mCost(cst), mExpenditure(exp) {}
 
    Automobile::Type type(void) { return mType; }
    unsigned capacity(void) { return passenger_capacity; }
    unsigned cost(void) { return mCost; }
    unsigned expenditure(void) { return mExpenditure; }
 
    void setType(Automobile::Type t) { mType = t; }
    void setCapacity(unsigned cap) { passenger_capacity = cap; }
    void setCost(unsigned cst) { mCost = cst; }
    void setExpenditure(unsigned exp) { mExpenditure = exp; }
 
private:
    Automobile::Type mType;
    unsigned passenger_capacity, mCost, mExpenditure;
};
 
class Taxopark
{
    std::vector<Automobile> park;
public:
    Taxopark(void) = default;
    Taxopark(std::vectot<Automobile> &p) : park(p) {}
 
    unsigned TotalCost(void) { unsigned c = 0; for (int i = 0; i < park.size(); ++i) c += park[i].cost(); return c; }
};