5. Two years ago the Lange family used $3,250 worth of electricity. Last year they switched to balanced billing.
a. What was their monthly payment last year under balanced billing? Round to the
nearest cent.
b. During last year, they actually used $3,766 of electricity and their balanced billing
payments were not enough to pay for their electrical usage. They had to pay the
difference at the end of the year. How much did they owe the utility company?