Mrs. Daniel is grading math tests in the teachers' lounge. She has already
finished grading 18 assignments, and is grading 3 more assignments per hour.
Her teaching assistant just came in to help her. She can grade at a rate of 9
assignments every hour. How long will it take for her to catch up to Mrs. Daniel?
How many assignments will they have each graded?

Option B. $170.10

Step-by-step explanation:

Gail bought groceries worth = $165.00

She gets rebate of taxes on the amount = $80.00

She has to pay tax on = 165 - 80 = $85.00

In her state sales tax are = 6%

So her tax on groceries  = 6% of 85 = 0.06 × 85 = $5.10

Now she paid total amount = 165 + 5.10 = $170.10

Gail paid $170.10 for the groceries, including sale tax

Option B. $170.10