Answer
See below
Work Step by Step
(a)
Compute the value of the discount using the equation as shown below:
\[\begin{align}
& \text{Value of discount}=\text{Sales price}-\text{Discount percent} \\
& =\$120-\left(\$120\times0.15\right)\\&=\$18\end{align}\]
(b)
Compute the amount of sales price of the CD player using the equation as shown below:
\[\begin{align}
& \text{Discounted Sales price}=\text{Sales price}-\text{Amount of the Discount} \\
& =\$120-\$18\\&=\$102\end{align}\]
