Answer
(a) $-\$222.73$
(b) $-\$179.79$
Work Step by Step
(a)
We calculate Charlene's balance:
$-\$237.59+\$47.25-\$12.39-\$20.00$
$=-\$222.73$
Thus she should make a payment of $\$222.73$ to achieve $\$0$ balance.
(b)
We start with the balance from (a) and include the new changes to the account:
$-\$222.73+\$75.00-\$32.06$
$=-\$179.79$