A company will manufacture a total of 5000 units of its product at plants A and B. At plan A the unit cost for labor and material combined is $2.50, while at plant B it is $3.00. The fixed costs at plant A are $6000 and at plant B they are $8000. Between the two plants the company has decided to allot no more than $28,000 for total costs. The minimum number of units that must be produced at plant A is

A. 2546.
B. 1871
C. 2000.
D. 2500
E.2545

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