Suppose Rosa earns $600 per week working as a doctor for the Medical Clinic. She uses $8 to get her car washed at Spotless Car Wash. Spotless Car Wash pays Nick $375 per week to wash cars. Nick uses $100 to purchase medical services from the Medical Clinic. Which of the elements of this scenario represent a flow from a household to a firm? This could be a flow of dollars, inputs, or outputs.

A. The car wash Rosa receives

B. Rosa's labor

C. The $100 Nick spends to purchase medical services from the Medical Clinic

D. The $375 per week Nick earns working for Spotless Car wash

Exercise 2-12 cost behavior; high-low method [lo2-3, lo2-4] speedy parcel service operates a fleet of delivery trucks in a large metropolitan area. a careful study by the company’s cost analyst has determined that if a truck is driven 120,000 miles during a year, the average operating cost is 11.6 cents per mile. if a truck is driven only 80,000 miles during a year, the average operating cost increases to 13.6 cents per mile. required: 1.& 2. using the high-low method, estimate the variable and fixed cost elements of the annual cost of truck operation. (round the "variable cost per mile" to 3 decimal places.)