Sunland Phone Services offers a cellular phone plan for $54 per month. Under this plan, you can make an unlimited number of phone calls and talk as long as you like. (a) Prepare a table that shows the cost per minute of airtime and the total amount of the phone bill at the following usage levels: 15 minutes, 108 minutes, 270 minutes, and 540 minutes. (Round unit costs to 2 decimal ploces, 6.8.52.75. (b) What type of cost behavior does Sunland's phone plan illustrate? Why? This is a because total cost while the cost per minute as minutes used increas If you use 1.400 minutes of airtime per month, which plan would you prefer, $54 per month or $0.02 per minute? What if you used 3.800 minutes per month? At what level of airtime usage would you become indifferent between the two plans? 1,400 minutes 3.800 minutes Indifferent at minutes