Answer: more than $80
Explanation:
Ben weites a check of $60, wich is returned with aditional charges (so now he must spend more than $60)
And the company also charges him by $20.
So the amount of Ben must have to balance his debts is:
the initial $60 + the $20 charged + the additional charges of the bank.
Then he needs to have more than $80 to balance his debts.