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:

1. Which of the preceding costs is variable? Fixed? Mixed? Explain.
2. Using the high-low method, determine the cost function for each cost.
3. Combine the preceding information to get a monthly utility cost function for Java Joe€™s.
4. 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 themonth.

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Electricity Kilewat Telephone Telephone Gallons of Month Bill Hours Used Bill 2,400 2,800 3,660 2,700 3,920 4,160 3,480 3,980 4,200 4,100 3,960 4220 Minutes Used Water Bill Water Used 720 February 840 $1,098 $ 810 $1,176 $1,248 $1,044 $1,194 September $1,260 $1,230 November $1,188 December $1,266 $184.00 $182.40 $189.80 $179.20 $196.00 $197.60 $186.80 $192.40 $191 20 $18760 $182.00 $ 97.00 January 2,200 2,120 2480 1,960 2,800 2,880 2340 2,620 2,560 2380 2,100 2,700 $120 $120 $120 $120 $120 $120 51,080 $120 $120 62,444 $120 $120 $120 S120 68,200 61,120 53,400 62,900 59,930 61,136 March April May June July August 65,380 67,080 63,940 57,200 October