A utilty company charges $0.12 per kilowatt-hour of electricity a customer with a solar panel generates that they don’t use themselves. A customer has a charge of $82.04 and a credit of -$4.10 on this months bill.

#1 - What is the amount due this month?
#2 How many kilowatt-hours did they use?
#3 How many kilowatt-hours did they generate that they didn’t use themselves?
#4 What did a positive amount represent? What did a negative amount represent?