Susan Williams runs a small Flagstaff job shop where garments are made. The job shop employs eight workers. Each worker is paid $8 per hour. During the first week of March, each worker worked 48 hours. Together, they produced a batch of 144 garments. Of these garments, 54 were 'seconds' (meaning that they were flawed). The seconds were sold for $90 each at a factory outlet store. The remaining 90 garments were sold to retail outlets at a price of $200 per garment. What was the labor productivity, in dollars per labor-hour, at this job shop during the first week of March? = Labor productivity dollars/labor hour (round your response to two decimal places).