Answer:The amount of money that she has left for gift C is $14.75
Explanation:
Total amount of money that Mason had to spend on the three gifts is 30 dollars. He spent 8 3/4 dollars on gift A. Converting 8 3/4 to decimal, it becomes 8.75 dollars. He spent 6 1/2 dollars on gift B. Converting 6 1/2 to decimal, it becomes 6.5 dollars. Total amount of money that she spent on gift A and gift B will be 8.75 + 6.5 = $15.25
The amount of money that she has left for gift C would be total amount that she had - the total amount that she spent on gift A and gift B. It becomes
30 - 15.25 = $14.75