To keep track of all the costs and quantities for each item that you purchase, you would create a purchase order and send it to your vendor supplier to place an order. When you receive the goods, you would record them in your inventory. As you sell products to customers, you will record the sale in QuickBooks so that your inventory, cost, and quantities can be adjusted in real time.
If you purchase computers, printers, or other equipment for your business, these items are called fixed assets. When you record these items in QuickBooks, they will be categorized as fixed assets. Fixed assets should be depreciated over their useful life.