Because you can not produce a small parts according to customer requirements. So you have to order from the company. As a result, the sales are very high.
Because you are not able to produce items that are small parts according to customer requirements. So you want to buy products from the company, as a result, sales of goods to you.
Because you are not able to produce goods that are small parts of a customer need, so you need to purchase products from the company, total sales, you have very high