21 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. Week 1 2 Output 392 #Workers 5 Material (ft) 408 6 2720 2790 If we measure the productivity by $/$ (both output and input are measured by $ amount), what is the multifactor productivity of week 1? (Please keep 3 digits after the decimal point.)