ANSWER
[tex]\text{ \$121.10}[/tex]EXPLANATION
We want to find the sale price of the tray.
The original price of the tray is $173 but it was sold at 30% off.
This means that the sale price is the original price minus 30% of the original price.
That is:
[tex]\begin{gathered} SP=173-(\frac{30}{100}\cdot173) \\ SP=173-51.90 \\ SP=\text{ \$121.10} \end{gathered}[/tex]That is the sales price.