Margaret Williams, production manager at Williams Manufacturing, finds her profits at $15,000 inadequate for her business. The bank is insisting on an improved profit picture prior to an approval of a loan for some new equipment. Margaret would like to improve the profit line to $25,000 so she can obtain the approval for the loan. Given the information below and using a Supply Chain Strategy, what percentage change of their Cost of Supply Chain Purchases would need to be reduced to achieve a $25,000 profit