Dave's Dogs sells steamed hot dogs for $2.50 each. The company provided the following units and total cost data concerning its hotdog sales for the last six months of 2017: July August September October November December Cost $3,020 2,795 3,040 2,700 2,750 3,085 Units 2,400 2,150 2,300 2,250 2,160 2,340 I a. Use the high-low method to estimate fixed and variable costs. b. Estimate total profit in a month when 2,200 hotdogs are sold. C. Based on these estimates, calculate the number of hotdogs that must be sold to break- even. d. How does linear regression differ from the high-low method in estimating fixed and variable costs?