• Resource-allocation

• Cost-benefit-trade-off

• Transshipment problems

• Transportation problems

• Assignment problems

A firm has 4 plants that produce widgets. Plants A, B, and C can each produce 100 widgets per day. Plant D can produce 50 widgets per day. Each day, the widgets produced in the plants must be shipped to satisfy the demand of 3 customers. Customer 1 requires 75 units per day, customer 2 requires 100 units per day, and customer 3 requires 175 units per day. The shipping costs for each possible route are shown in the table below: Shipping Costs per unit Plant A 1 $ 25 $ 20 Customer 2 3 $ 35 $ 15 $ 30 $ 40 $ 35 $ 20 $ 20 $ 25 B $ 40 $ 15 D The firm needs to satisfy all demand each day, but would like to minimize the total costs. The firm's problem falls within which classification