The weekly output of a fabrication process is shown below together with data for labor and material inputs. Standard selling price is $125 per unit. Overhead is charged weekly at the rate of $1,500 plus .5 times direct labor cost. Assume a 40-hour week and an hourly wage of $16. Material cost is $10 per foot. What is the average multifactor productivity?
A. 1.463
B. 1.457
C. 1.431