Answer
$\$30.13$
Work Step by Step
According to the information given, we have:
Andrew's starting balance: $\$48.35$
Withdraws: $\$35.99, \$20.00, \$28.50$ (subtract)
Deposits: $\$66.27$ (add)
Thus the total sum is:
$\$48.35-\$35.99-\$20.00-\$28.50+\$66.27$
$=\$30.13$