A jacket has a marked retail price of $\$ 120$, but is on sale at a $20 \%$ discount. If a customer has a coupon for $10 \%$ off of the sale price, and if the sales tax is $5 \%$, what is the final price of this jacket, including all discount and tax ?

Question

$\begin{array}{1 1} (a)\; \$ 89.90 \\ (b)\; \$ 90.00 \\ (c)\; \$ 90.72 \\ (d)\; \$ 91.05 \end{array}$