Refer to Figure 3-4. At a price of $20, how many units will be sold?

Consumption spending includes spending on:

A. stocks, bonds, and other financial instruments. B. capital goods, residential housing, and changes in inventories. C. goods and services by federal, state, and local governments. D. durables, nondurables, and services.

Which of the following is the best example of complements?

a. milk and cheese b. coffee and tea c. CDs and DVDs d. hiking boots and athletic shoes e. film and film processing (developing)