Game theory is a tool for studying ________

The downward sloping aggregate demand curve can be explained in part through the:

A. positive relationship between the price level and net exports. B. positive relationship between the price level and consumption. C. negative relationship between the price level and investment spending. D. All of these are true.

Refer to Scenario 9.6 below to answer the question(s) that follow. SCENARIO 9.6: Celeste borrowed $40,000 from her brother to open a car wash. She pays her brother a 5% yearly return on the money he lent her. Her other yearly fixed costs equal $18,000. Her variable costs equal $40,000. In her first year, Amy sold 40,000 car washes at a price of $2.50 per car wash.Refer to Scenario 9.6. Celeste's total fixed costs equal

A. $2,000. B. $18,000. C. $20,000. D. $22,000.