You would like to determine the profit impact of adding a new product that has similarities with an existing product (namo customers, same use etc.). If you use the Incremental approach, this information is NOT needed. O Sales forecasts for the existing product, before and after the new product Oll of the other 4 answers are needed for the incremental approach. Sales forecast for the new product, cannibalised sales Sales forecast for the new product, non-cannibalized sales $C for the existing and the new products