Suppose five identical machines are to be used to produce two different products. The operating parameters for the two products are as follows: a1 = 2 min; a2 = 2.5 min; b1 = 1 min; b2 = 1.5 min; t1 = 6 min; and t2 = 8 min. The cost parameters are the same for each operator-machine combination: Co = $15/hr and Cm = $50/hr. Determine the method of assigning operators to machines that minimizes the cost per unit produced