Operation management 11th edition Stevenson, William. solution for this problem; The weekly output of a production process is shown below, together with data for labor and material inputs. The standard inventory value of the output is $125 per unit. Overhead is charged weekly at the rate of $1500 plus .5 times direct labor cost. Assume a 40-hour week and an hourly wage of $16. Material cost is $10 per running foot. What is the average multi-factor productivity for this process?