$2\mathrm{.}9.$ The total processing cost for producing the X$-$Pacer running shoe in Problem $2\mathrm{.}5$ is $$18.$ The Omega Shoe Company starts production of $650$ pairs of the shoes weekly, and the average weekly yield is $90\%,$ with $10\%$ defective shoes. One quarter of the defective shoes can be reworked at a cost of $$3\mathrm{.}75.$

Compute the quality$$productivity ratio $($QPR$).$

Answer

$5\mathrm{.}11$

Compute the QPR if the production rate is increased to $800$ pairs of shoes per week.

Answer

$5\mathrm{.}11$

Compute the QPR if the processing cost in part a$.$ is reduced to $$16\mathrm{.}50$ and the rework cost to $$3\mathrm{.}20.$

Answer

$5\mathrm{.}58$

Compute the QPR if the product yield in part a$.$ is increased to $93\%$ good quality.

Answer

$5\mathrm{.}24$

$2\mathrm{.}10.$ Airphone, Inc., manufactures cellular telephones at a processing cost of $$47$ per unit. The company produces an average of $250$ phones per week and has a yield of $87\%$ good$-$quality phones, resulting in $13\%$ defective phones, all of which can be reworked. The cost of reworking a defective telephone is $$16.$

Compute the quality$$productivity ratio $($QPR$).$

Compute the QPR if the company increased the production rate to $320$ phones per week while reducing the processing cost to $$42,$ reducing the rework cost to $$12$ and increasing the product yield of good$-$quality telephones to $94\%.$