Below Are the Input Costs for a Vet Clinic $$

Below are the input costs for a Vet Clinic.
Suppose that labor (hrs) is used to produce vet services (appts) at the Vet Clinic.
The wage rate, or price of labor is PX=$20/hr, and the price of an appointment is P<sub>Y<\sub>=$10/appt.
$$ $$ $\quad$

$\begin{array}{lccccc}\underline{\mathrm{X}} & \underline{\mathrm{Y}} & \underline{\text { TRP }} & \underline{\text {TFC}} & \underline{\pi} &\underline{\text {MRP}} &\underline{\text { MFC }} \\\text {UNITS: }& &\underline {\quad\quad } &\underline {\quad\quad } &\underline {\quad\quad } &\underline {\quad\quad } &\underline {\quad\quad } \\0& \underline {\quad\quad } &\underline {\quad\quad } &\underline {\quad\quad } &\underline {\quad\quad } &\underline {\quad\quad } &\underline {\quad\quad } \\1 & 5 &\underline {\quad\quad } &\underline {\quad\quad } &\underline {\quad\quad } &\underline {\quad\quad } &\underline {\quad\quad } \\2 & 15 &\underline {\quad\quad } &\underline {\quad\quad } &\underline {\quad\quad } &\underline {\quad\quad } &\underline {\quad\quad } \\3 & 30 &\underline {\quad\quad } &\underline {\quad\quad } &\underline {\quad\quad } &\underline {\quad\quad } &\underline {\quad\quad } \\4 & 40 &\underline {\quad\quad } &\underline {\quad\quad } &\underline {\quad\quad } &\underline {\quad\quad } &\underline {\quad\quad } \\5 & 45 &\underline {\quad\quad } &\underline {\quad\quad } &\underline {\quad\quad } &\underline {\quad\quad } &\underline {\quad\quad } \\6 & 47 &\underline {\quad\quad } &\underline {\quad\quad } &\underline {\quad\quad } &\underline {\quad\quad } &\underline {\quad\quad } \\7 & 45 &\underline {\quad\quad } &\underline {\quad\quad } &\underline {\quad\quad } &\underline {\quad\quad } &\underline {\quad\quad } \\\end{array}$
-The units for MRP are:</sub>

A) hrs
B) $/hr
C) $/appt
D) $