first, I copy RC00 to RC10 and change its Calculat.type = B(Fixed amount).
second, I place a sales order to deliver 10 PC(RC10 = 10 USD) to customer and bill 8PC(RC10 = 8 USD) to customer.
third, I place a return sales order(only return 2 PC) reference to above billing but the RC10's amount is still 8 USD instead of 2 USD.
I think this is relative to Cond.base value and Cond.control = F(Condition value fixed (billed)) and who can tell me how to realize my purpose?
tks in advance.