2. Luwak Coffees wants to find an equation to estimate monthly utility costs. Luwak has been in business for one year and has collected the following cost data for utilities: Month January February March April May June Electricity Bill July August $ 720 $ 840 $1,098 $ 810 $1,176 $1,248 $1,044 $1,194 September $1,260 October $1,230 November December $1,188 $1,266 Kilowatt Hours Used 2,400 2,800 3,660 2,700 3,920 4,160 3,480 3,980 4,200 4,100 3,960 4,220 Telephone Bill $184.00 $182.40 $189.60 $179.20 $196.00 $197.60 $186.80 $192.40 $191.20 $187.60 $182.00 $97.00 Telephone Minutes Used 2,200 2,120 2,480 1,960 2,800 2,880 2,340 2,620 2,560 2,380 2,100 2,700 Water Bill $120 $120 $120 $120 $120 $120 $120 $120 $120 $120 $120 $120 Gallons of Water Used 61,120 53,400 62,900 59,930 61,136 51,080 65,380 62,444 67,080 63,940 57,200 68,200 Required: a) Which of the preceding costs is variable? Fixed? Mixed? Explain. b) Using the high-low method, determine the cost function for each cost. c) Combine the preceding information to get a monthly utility cost function for Java Joe's. d) Next month, Luwak expects to use 4,400 kilowatt hours of electricity, make 3,000 minutes of telephone calls, and use 64,000 gallons of water. Estimate total cost of utilities for the month.

2. Luwak Coffees wants to find an equation to estimate monthly utility costs. Luwak has been in business for one year and has collected the following cost data for utilities: Required: a) Which of the preceding costs is variable? Fixed? Mixed? Explain. b) Using the high-low method, determine the cost function for each cost. c) Combine the preceding information to get a monthly utility cost function for Java Joe's. d) Next month, Luwak expects to use 4,400 kilowatt hours of electricity, make 3,000 minutes of telephone calls, and use 64,000 gallons of water. Estimate total cost of utilities for the month