Answer:
Total Cost = $72.79
Explanation:
Tax rate: 8.75% Tip: 18%
First, add up the cost of Mr. Rodriguez, Mrs. Rodriguez, and their 3 kids' meals.
16.25 + 19.50 + 3(6.99)
16.25 + 19.50 + 20.97
$56.72
Next, find the cost of the tax. 8.75%
8.75% of 56.72 = 0.0875 × 56.72 = $4.963
The tip is applied after the tax so we have to add the tax first and then find 18% of the sum.
56.72 + 4.963 = 61.683
18% of 61.683 = 0.18 × 61.683 = $11.10294
Then, add to find the total cost.
56.72 + 4.963 + 11.10294 = $72.78594
I'm assuming you have to round so it's approximately $72.79
I hope its right :) good luck!