In the project file I created purchase orders. In the purchase order I would create new products as I went along. I selected the items as inventory, then I selected either consumable or non-consumable. I created the part number, entered the description in both spaces. In the first space I never allocated the selling price because I don't sell them as loose items, only as completely assembled goods. I input a purchase price and selected standard VAT. I also input the stock on hand at time of order with the date and preferred supplier. I enter and it takes me back to the purchase order where I adjust the quantity.