Answer:
Merchant wholesaler
Step-by-step explanation:
A merchant wholesaler is a business owner that specializes in purchasing goods in large quantities and then sell to other retailers and wholesalers.
Since they purchase their products in large quantities, they have different warehouses in their acquisition. These warehouses are used to store the products.
Merchant wholesalers are very vital in the chain of distribution as they facilitate the smooth movement of goods which takes places between the producers and the retailers.
In the scenario described above, W.W. Grainger is an example of a merchant wholesaler.