2. An electricity company bills its customers a fixed monthly fee plus a charge for each kilowatt hour (KWh) of electricity used. A household that used 670 k Wh was billed $119.20, whereas a household that used 800 k Wh was billed $140.00. A. What is the charge per kilowatt hour? B. Find a formula for the total cost of a customer's electricity as a function of kilowatt hours used. C. If a customer's bill was $100.00 dollars, then how many kilowatt hours of electricity did the customer use? Previous Next O O