The following considerations also apply:

■ There is an administrative cost of $5000 associated with setting up a supplier’s account. For example, if Motorola uses three suppliers, it incurs an administrative cost of $15,000.

■ To ensure reliability, no supplier can supply more than 80% of Motorola’s demand for any product.

■ A supplier must supply an integer amount of each product it supplies.

Develop a linear integer model to help Motorola minimize the sum of its purchase and administrative costs.