Net Domestic Product is derived by subtracting indirect business taxes from Gross Domestic Product

A meatball sandwich vendor finds that when he charges a price of $6, he sells 100 meatball sandwiches. When he charges a price of $4, he sells 200 meatball sandwiches. The marginal revenue for each of the additional 100 meatball sandwiches he sells is

a. $6 b. $4 c. $3 d. $2 e. $1

The theoretical model of the intertemporal budget constraint suggests that the most important factor in support of individual savings is:

a. the preference of the individual. b. a higher rate of return on savings. c. an increase in income. d. a decrease in the cost of living.