public void PriceCheck()
{
Checkout.Scan("A");
Checkout.Scan("B");
Checkout.Scan("C");
Checkout.Scan("D");
Checkout.Scan("D");
Assert.Equal(0, Checkout.PriceCheck(""));
Assert.Equal(50, Checkout.PriceCheck("A"));
Assert.Equal(80, Checkout.PriceCheck("AB"));
Assert.Equal(115, Checkout.PriceCheck("ABCD"));
Checkout.ClearBasket();
}