Which of the following is an example of an injection into the circular flow of income and expenditure?

In the U.S. economy, the quantity of donuts produced each day is determined by the

A) U.S. Food and Drug Administration. B) U.S. Department of Health and Human Services. C) Donut Association of America. D) individual decisions of thousands of donut makers.

In the above table, the firm's total fixed cost of production is

A) $3.00. B) $4.00. C) $7.00. D) $29.00.