Carmen Co$,$ can further process Product $J$ to produce Product $D.$ Product $J$ is currently selling for $$20\mathrm{.}00$ per pound and costs $$15\mathrm{.}75$ per pound to produce. Product $D$ would sell for $$38\mathrm{.}00$ per pound and would require an additional cost of $$8\mathrm{.}55$ per pound to produce.

The differential revenue of producing Product $D$ is

a$.$ $$18,00$ per pound

b$.$ $$6\mathrm{.}75$ per pound

$x$ c$.$ $$6\mathrm{.}25$ per pound

d$.$ $$22\mathrm{.}25$ per pound