Charlie bought a calculator which costs $\$75$ on sale at $5\%$ off. How much did he pay including $5\%$ sales tax.

Question

$\begin{array}{1 1} (a)\; \$ 74.61 \\ (b)\; \$ 74.81 \\ (c)\; \$ 74.31 \\ (d)\; \$74.91 \end{array}$