This is my first post here. In our pharmaceutical business we give bonus item to customer if they purchase a certain number of items as shown in the screenshot below.
I’ve added the bonus column in sales invoice item table. What I want is that below the table total quantity will be calculated including the bonus quantity and the calculated total will be deducted from the stock. For example, in the screenshot it is showing 10. I want it to be 11 and 11 items should be deducted from stock. How can I achieve this?
Thanks in advance.