7. A large number of semiautomatic machines produce identical products. Time studies reveal the following time in minutes for one man to service one machine: 3.1 Load machine 0.6 Remove finished product Inspect finished product Pack finished product 2.4 1.9 0.4 Walk to next machine The machine takes 41.3 minutes to produce a finished product. Machine operators are paid $4.90 per hour and the burden rate for the machine is $18.00 per hour. What is the lowest cost per unit to produce the product with the optimum ratio of men to machines