Answer: $40.35 was the total bill.
Explanation:
They each bought cookies for $9.25 and soda for $6.55 meaning that we have to multiply each cost by two to find their total value.
2(9.25) + 2(6.55) = 18.50 + 13.10 = 31.60
They also aded $8.75 sales tax meaning that we have to add it to the total value.
31.60 + 8.75 = $40.35