Trying to get amount unfulfilled with dollar amount open

I'm probably explaining that weird. I have a search that basically showed open orders with the current month total (Meaning only including items still pending to ship, not the total transaction amount). The report works great but we wanted to convert it to show the same thing based on line items. My formula almost works, however it returns the full rate and does not deduct the rate - discount like that native {netamount} does.

Formula is: ({quantity} - {quantityshiprecv}) * {rate}

{discountrate} doesn't work, {discountamount} deducts the entire orders discount not just that line item.

I've scoured here and suite answers for hours and I have tried everything I can think of and still can't get this to work. Any help would be appreciated.