Answer: 26.37%
Step-by-step explanation:
Given that,
Standard cost of CD players = $161 per unit
Labor = $34
Materials = $74
Overhead = $53
Sales price = $300 per unit
Current multi-factor productivity =

=

= 1.86
Revised multi-factor productivity after productivity increase by 14 % = 2.1204
Thus given sales price remaining constant at $ 300 and multi-factor productivity of 2.1204
Revised standard cost of CD players =

= $141.48
Let the corresponding material cost be $m,
Therefore,
Labor cost + m + overhead cost = $141.48
$34 + m + $53 = $141.48
m = $54.48
percentage reduction in material cost =

=

= 26.37%
MATERIAL COST MUST REDUCE BY 26.37%.