Hi,
One of my customers needs to issue items during selling other items in the sales order , For example one product pen should be sold with pen packet in this case sales order will have the following lines .
Item id - Item Name- Price- Quantity - Total Amount
1 - Pen - 10 - 2 - 20 (this item will be in the customer invoice).
2- Pen packet-0-2-0 (This item will not be charged to the customer and it's added here to reduce the quantity from the stock).
How to achieve that ?