public IProduct SelectProduct(string productName)
{
IProduct result = null;
if (AvailableProducts.Contains(productName))
{
int itemPrice = inventoryManager.GetPrice(productName);
if (itemPrice > currentBalance)
{
HandleInsufficientFunds(itemPrice);
}
else
{
result = inventoryManager.Dispense(productName);
if (result == null)
{
HandleSoldOut();
}
else
{
HandleValidSelection(result);
}
}
}
PromptForCoins();
return(result);
}
