Start a new deal "Granny deal" with multiple products. Lets say apples and oranges. Apples are worth $6 and oranges $4. So we have $10 in new deals which will show up in the deals started report. 

But later through the sales process Granny decides she ONLY wants apples. How can I make the deal won $6 apples and lost $4 oranges? If I delete product oranges, the previous report of new deals will be reduced and not show a true representation.

It not only affects new deals but conversion as well. Want to split deals with won and lost portions of the deal or looking for a better way.