Answer
$$
\begin{aligned}
& \mathbf{F}_R=\{44.5 \mathbf{i}+53.1 \mathbf{j}+40 \mathbf{k}\} \mathbf{N} \\
& \mathbf{M}_{R A}=\{-5.39 \mathbf{i}+13.1 \mathbf{j}+11.4 \mathbf{k}\} \mathrm{N} \cdot \mathrm{m}
\end{aligned}
$$
Work Step by Step
$$
\begin{aligned}
& \mathbf{F}_R=\Sigma \mathbf{F} ; \\
& \mathbf{F}_R=80 \cos 30^{\circ} \sin 40^{\circ} \mathbf{i}+80 \cos 30^{\circ} \cos 40^{\circ} \mathbf{j}-80 \sin 30^{\circ} \mathbf{k} \\
& =44.53 \mathbf{i}+53.07 \mathbf{j}-40 \mathbf{k} \\
& =\{44.5 \mathbf{i}+53.1 \mathbf{j}-40 \mathbf{k}\} \mathbf{N} \\
& \mathbf{M}_{R A}=\Sigma \mathbf{M}_A ; \quad \mathbf{M}_{R A}=\left|\begin{array}{ccc}
\mathbf{i} & \mathbf{j} & \mathbf{k} \\
0.55 & 0.4 & -0.2 \\
44.53 & 53.07 & -40
\end{array}\right| \\
& =\{-5.39 \mathbf{i}+13.1 \mathbf{j}+11.4 \mathbf{k}\} \mathbf{N} \cdot \mathrm{m} \\
&
\end{aligned}
$$
