The weekly output of a fabrication process is shown below, together with data for labor and material inputs. Overhead is charged weekly at the rate of $1,500 plus 0.5 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 for the two weeks? Week 1 2 Output 48000 40000 Number of Workers Materials (Foot) 10 3000 6 2500