[tex]\bf {{ a}}\%\ of\ b \implies \cfrac{{{ a}}}{100}\cdot b\implies {{ a}}\div 100\cdot b\\
-----------------------------\\
thus\implies {{5}}\%\ of\ 1360 \implies \cfrac{{{ 5}}}{100}\cdot 1360\implies {{ 5}}\div 100\cdot 1360\implies \boxed{a}
\\\\
\textit{so, the discounted price is }1360-\boxed{a} \\
\textit{now, there's an 8\% tax on that amount, so the final cost is}
\\\\
[/tex][tex]\bf {{ 8}}\%\ of\ 1360-\boxed{a}
\\\\
\implies \cfrac{{{ 8}}}{100}\cdot 1360-\boxed{a} \implies {{ 8}}\div 100\cdot 1360-\boxed{a} \implies \boxed{b}
\\\\\\
\textit{final cost}\implies (1360-\boxed{a})+\boxed{b}[/tex]
