zoho billing software spreadsheet plus+ should have one additional last coloumn which will be total of that row. i,e final total of net payable by client after discount+sgst+cgst. So that it's easy to calculate price per piece. Even better is adding one more coloums for cost per piece. I have been requesting for this for more than 8 months. Please do the needful .Thanks . Prasanna agencies. Deepak Lalingkar