Final Answer:
The firm whose main purpose is to sell to other businesses, manufacturers, and hospitals, who then resell the products or use them in a product or service that is resold is called a wholesaler.
Step-by-step explanation:
A wholesaler is a business entity that functions as an intermediary in the supply chain, primarily catering to other businesses, manufacturers, and institutions. The primary role of a wholesaler is to purchase goods in bulk from manufacturers and then sell them in smaller quantities to retailers, other businesses, or hospitals. These intermediaries contribute to the distribution network by facilitating the movement of products from the point of production to the end-user or retailer. Wholesalers enable efficiency in the supply chain, as businesses can obtain the necessary products for their operations without dealing directly with manufacturers.