A local Pharmacy has a chain of stores throughout Trinidad and Tobago. They are considering the implementation an e-commerce platform to expand its market. However, the pharmacy is unsure of what e-commerce services to provide. The business currently has a website where it displays the catalogue of products. The pharmacy offers prescription drugs, over-the-counter drugs, gift items, medical supplies of all types, and many goods normally available in a supermarket. They also stock many items as a retailer for many medical and pharmaceutical companies. A "drive-thru" is available at most outlets. Advise the pharmacy based on the following questions:

a. Given that they work closely with wholesalers, justify one potential e-commerce B2B business model that the pharmacy can consider. Ensure to identify with examples the appropriate revenue model that can be utilised with the stated business model