Given:
The cost of each hoodie is, C = $15.
The discount percentage is, d = 15%.
The tax percentage on purchase is t = 8%.
The objective is to find the final cost of the hoodie.
The selling price of one hooie can be calculated as,
![\begin{gathered} SP=c-d \\ =15-((15)/(100)*15) \\ =15-2.25 \\ =12.75 \end{gathered}](https://img.qammunity.org/2023/formulas/mathematics/college/6x5e7xjwoooeadn0l1ouq7bljl2utd7tlx.png)
Now, by adding sales tax to the selling price the final cost will be,
![\begin{gathered} FC=SP+t \\ =12.75+((8)/(100)*12.75) \\ =12.75+1.02 \\ =13.77 \end{gathered}](https://img.qammunity.org/2023/formulas/mathematics/college/3l2jejaxj49rvqwmc6cu7dzr9ggg7aag6g.png)
Cost of two hoodie can be calculated as,
![\begin{gathered} C(\text{two)}=2*13.77 \\ =27.54 \end{gathered}](https://img.qammunity.org/2023/formulas/mathematics/college/zguz18gof5eh0g1r5qogxw1tnq12tzkocj.png)
Hence, the final cost of one hoodie is $13.77 and final cost of two hoodie is $27.54.