Answer:
$6.6
Explanation:
We add the amount he paid,
($87.21 + $5.64) - $15.00 + 55.25
We will get ,
$92.85 - $15.00 + $55.25
Then,
$77.85 + $55.25
We will get,
$133.10, the subtract the $133.10 from his original balance and get
$126.50 - $133.10 = $-6.6
He will need to deposit $6.6 to get his account to $0 balance