Should an estimate or the exact answer be calculated? Then do the appropriate calculation.

Megan had a $50 gift card for the sporting goods shop. She made 3 purchases of $6.75 each and 2 purchases of $10.50 each. How much money is left on the card?

A.
An estimate is sufficient. There is about $9.00 left on the card.

B.
The exact answer is needed. There is $8.75 left on the card.

Question

Should an estimate or the exact answer be calculated? Then do the appropriate calculation. 
 
Megan had a $50 gift card for the sporting goods shop. She made 3 purchases of $6.75 each and 2 purchases of $10.50 each. How much money is left on the card?
 
 A.
An estimate is sufficient. There is about $9.00 left on the card.
 
 B.
The exact answer is needed. There is $8.75 left on the card.

anonymous · Answer

The exact answer is needed, because if she were to buy something that were 9 dollars, she'd be 25 cents short