Current Attempt in Progress

A production process has a percentage of good products produced each day $(G)$ of $75\%$ and a percentage of poor$-$quality products that can be reworked of $50\%.$ The unit processing cost and the rework cost are both $$1$ per unit. Its quality$-$productivity ratio, QPR$,$ is

$79\mathrm{.}78$

$73\mathrm{.}79$

$77\mathrm{.}78$

$75\mathrm{.}79$