// Returns the cost (or income) to buy the ship. If cost is negative, than
// the player will receive money upon changing the ship. the cost of the
// ship is decreased for each item in the cargo
public int CostToBuy(Ship shipToBuy)
{
int total = shipToBuy.Price;
foreach (Good cargo in Game.Instance.Player.Ship.Cargo)
{
total -= marketplace.GetPrice(cargo);
}
//TODO: implement gadgets
total -= Game.Instance.Player.Ship.Price;
return(total);
}