stationery. The job shop hires 10 workers, and each worker is paid US$15 per hour. During the third week of July, the 10 workers together produced 150 units of printed stationery. Each worker during this week of July worked 40 hours. Fifty out of the 150 units of stationery produced had minor defects and were sold at a reduced price of US$3 per unit at discount outlet stores. The remaining 100 pieces of stationery were sold at retail stores such as OfficeMax (now a subsidiary of Office Depot, Inc., Boca Raton, FL) and Staples Inc. (Framingham, MA) for a price of US$5 each. Compute the labor productivity in U.S. dollars per hour during the third week of July.