Question Completion Status: A Moving to the next question prevents changes to this answer. Question 8 of 10 Question 8 1 points Save Answer 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 Customer per unit Plant 1 2 3 $ 25 $ 35 $ 15 B $ 20 $ 30 $ 40 $ 40 $ 35 $ 20 D $ 15 $ 20 $ 25 The firm needs to satisfy all demand each day, but would like to minimize the total costs Which of the following constraints is unnecessary for this problem (xij is the number of widgets shipped from factory i to customer )? XA, 1, XA,2, XA,3, XB,1, XB, 2, XB,3, XC,1, XC,2, XC,3 integer A SAMSUNG