you would want to create a new calculation called realPrice:
[AccPriceInc] + [AccHandlePriceInc] + [AccTipPriceInc] + [Price]
in the cart display page, where it is displaying the price column, change it to display the realPrice column.
you will also need to modify the TotalPrice calculation:
[Price] + [Quantity]
to:
([AccPriceInc] + [AccHandlePriceInc] + [AccTipPriceInc] + [Price]) * [Quantity]