The weekly оutput оf а fаbricаtiоn process is shown below together with data for labor and material inputs. Standard selling price is $100 per unit. Overhead is charged weekly at the rate of $1,000 plus 0.5 times direct labor cost. Assume a 40-hour week and an hourly wage of $10. Material cost is $10 per foot. Week Output (units) # Workers Material(Feet) 1 400 5 3600 2 448 6 5000 The labor productivity growth from week 1 to week 2 is: