3. The weekly output of a fabrication process is shown below, together with data for labor and material inputs. Standard selling price is $110 per unit. Overhead is charged weekly at the rate of ($1,200+ 3/4 times direct labor cost). Assume a 40-hour week and an hourly wage of $15. Material cost is $10 per foot. What is the average multifactor productivity? WEEK 1 2 OUTPUT 812 827 838 846 #WORKERS 5 6 7 MATERIAL (FT) 1360 1410 1425 1450 3 4 7