ISU Rate step-calculate amount without adding to final amount

Hi,

I have a requirement where,

price2 is used to evaluate quantity1, generating amount2.

Price2 already contains price1 + other prices.

I want to generate a line item, which gives the result of evaluating quantity1 with price1, generating amount1.

I used quanti01, to multiply price1 & quantity1, resulting in amount1. I changed the line to 'not relevant to posting' in the billing schema. But the net amount generates (amount1) is getting added to the final amount of the billing.

I want amount1 to genrate a line item that is just used for information purposes and not for final amount calculation.

Any help will be highly appreciated.

e.g.

price1 = $ 2

price2 = $ 3

quantity1 = 1000

I have line that will be posted, 3 * 1000 = 3000

I need to generate a line for reporting and info purposes that contains 2 * 1000 = 2000.

Regards,

Joshua.