Answer:
D. $150.80
Explanation:
We know from the problem that sale tax is 6%.
The water skis price was $180.
Rico had a $40 coupon, which is applied after sale tax.
So, including sale tax, the price would be
![\$180 + 0.06(\$180)=\$180 + \$10.8=\$190.8](https://img.qammunity.org/2020/formulas/mathematics/middle-school/ub99prcruobwplyqeuxql3h1mi8y04x3ou.png)
Then, including the $40 coupon, the final price would be
![\$190.80-\$40=\$150.80](https://img.qammunity.org/2020/formulas/mathematics/middle-school/29jquwcizn8g9auudhrrxkchitlcjkxbxx.png)
Therefore, the right choice is D.
Remember that you have to include the sale tax, which increases the price, and then you can applied the coupon discount.