public decimal GetTotalPrice()
{
decimal total = 0;
foreach (var item in _scannedItem)
{
var sku = item.Key;
int scannedTimes = item.Value;
total += _discount.GetDiscountedPrice(sku, ref scannedTimes);
total += scannedTimes * _catalog.GetProductPrice(item.Key);
}
return(total);
}
