CD players are produced on an automated assembly line process. The standard cost of CD players is $150 per unit (labor $30, materials $70 and overhead $50) the sales price is $300 per unit.

a. To achieve a 10 percent multifactor productivity improvement by reducing materials cost only, by what percentage must these costs be reduced?

b. To achieve a 10 percent multifactor productivity improvement by reducing labor cost only, by what percentage must these costs be reduced?

c. To achieve a 10 percent multifactor productivity improvement by reducing overhead cost only, by what percentage must these costs be reduced?