Answer
$$
F=167 \mathrm{lb}
$$
Resultant couple can act anywhere.
Work Step by Step
$$
\begin{aligned}
↺+\left(M_C\right)_R=\frac{3}{5} F(4) & +\frac{4}{5} F(1.5)-200(1.5)=300 \\\\
F & =167 \mathrm{lb}
\end{aligned}
$$
Resultant couple can act anywhere.
