A computer distributor can purchase workstations from any of 3 suppliers. Using decision variables xj!number of units purchased from supplier j, the following linear program computes a minimum cost way to purchase 300 workstations within applicable limits:

min 5x1 + 7x2 + 6.5x3 s.t. x1 + x2 + x3 = 300 3x1 + 5x2 + 4x3 … 1500 0 … x1 … 200 0 … x2 … 300 0 … x3 … 200 Do

(a) through (h) as in Exercise 11-1 using a setup cost of 100 and a minimum purchase of 125.