The Weekly Output of a Fabrication Process Is Shown Below

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

A) 1.463
B) 1.456
C) 1.431
D) 1.422
E) None of the choices are correct.