Answer
$$
\left(M_R\right)_C=240 \mathrm{lb} \cdot \mathrm{ft} ↺
$$
Work Step by Step
$$
\begin{aligned}
↺+\left(M_R\right)_c & =150\left(\frac{4}{5}\right)(1.5)+150\left(\frac{3}{5}\right)(4)-200(1.5) \\
& =240 \mathrm{lb} \cdot \mathrm{ft}↺
\end{aligned}
$$
