The following data resulted from a study taken on a horizontal milling machine: pieces produced per cycle: 8 average measured cycle time: 8.36 min average measured effort time per cycle: 4.62 min average rapid traverse time: 0.08 min average cutting time power feed: 3.66 min performance rating: 115 percent allowance (machine time): 10 percent allowance (effort time): 15 percent the operator works on the job a full 8-h day and produces 380 pieces. how many standard hours does the operator earn? what is the operator’s efficiency for the 8-h day?