The local utility company charges ABC Company at a mixed cost utility rate: an annual fee plus a variable cost for each kilowatt of power the company uses. Utility usage and costs are as follows: Kilowatts Utility Costs 187,976 $135,500 219,764 170,000 196,644 160,000 143,987 114,000 156,983 128,000 115,300 89,000 156,392 108,000 125,982 98,000 151,999 88,000 170,637 140,000 294,000 165,000 184,763 144,000