Cans are made in a process with two resources. The first resource has a capacity of 2.3 cans per hour. The capacity of the second resource is 2.3 cans per hour. The first resource has 1 worker and the second resource has 9 workers. Demand for this process is 2.8 cans per hour. Wages are $15 per hour. What is the cost of direct labor (in $ per unit?)