The fastest way to add inventory in GEM-CAR is to use the purchasing module via the POS.

-In the POS, create an estimate with your shop as the client.
-Use the estimate number as the purchase order number.
-Follow the procedure: How to receive a delivery through the POS see FAQ

The purchasing module with purchase order and delivery receipt was developed for shops that receive large quantities of inventory (price and quantity may vary) and their receipt and invoice entry are not done by the same person.