Explanation:

The main features of cash and carry are summarized best by the following definitions:

Cash and carry is a form of trade in which goods are sold from a wholesale warehouse operated either on a self-service basis or on the basis of samples (with the customer selecting from specimen articles using a manual or computerized ordering system but not serving themselves) or a combination of the two.
Customers (retailers, professional users, caterers, institutional buyers, etc.) settle the invoice on the spot in cash and carry the goods away themselves.
There are significant differences between "classical" sales at the wholesale stage and the cash and carry wholesaler: namely cash and carry customers arrange the transport of the goods themselves and pay for the goods on the spot, rather than on credit.
Access to purchase at a cash and carry is typically limited to operators of bona fide businesses, and the general public are not admitted.
Though wholesalers buy primarily from manufacturers and sell mostly to retailers, industrial users and other wholesalers, they also perform many value added functions. The wholesaler, an intermediary, is used based on principles of specialization and division of labor as well as contractual efficiency.