A contractor has kept accurate records on the installation of pressure vessels in a refi...

A contractor has kept accurate records on the installation of pressure vessels in a refinery. He had the following data:

A strike delayed further installations for 2 weeks (16 days) before the sixteenth unit could be installed. The contractor had a crew size of 11 workers who receive an average wage of $18 per hour. The rent on the equipment and the company overhead is $500 per day. The contractor noted that he “broke even” after having completed the eighth unit. Find the theoretical time to complete the first unit. Find the learning rate (in percent). When work resumes, how many units must be completed before the crew is working at the same pace it had when it completed the fifteenth unit? How long will it take to complete the sixteenth unit? What is the cost of the delay on units 16 through 20?