public void Execute()
{
var inventory = _customer.GetComponent <Inventory>();
if (inventory.Gold > _shopController.GetItemPrice())
{
var itemToBuy = _shopController.SellItem();
inventory.AddItem(itemToBuy);
inventory.AddGold(-itemToBuy.price);
}
else
{
_shopController.AddMessage("You do not have enough gold");
}
}