well, hmmm 5 and 1/2 or just 5.5%, let's find how much that is and add it to $90.
[tex]\begin{array}{|c|ll} \cline{1-1} \textit{a\% of b}\\ \cline{1-1} \\ \left( \cfrac{a}{100} \right)\cdot b \\\\ \cline{1-1} \end{array}~\hspace{5em}\stackrel{\textit{5.5\% of 90}}{\left( \cfrac{5.5}{100} \right)90}\implies 4.95~\hfill \underset{total~price}{\stackrel{90~~ + ~~4.95}{94.95}}[/tex]
