A second table (an opportunity loss table) must be computed when applying the maximin decision criterion

In the field of real estate, the term "equity" means:

a. the amount of the down payment b. the difference between the sales price and loan amount c. interest in property over and above existing liens d. all of the above

The actual margin per unit and margin per unit estimated in the plan are $6 and $8, respectively. The actual volume and the volume estimated in the plan are 5,000 units and 10,000 units, respectively. What is the margin variance of the business?

A) -$10,000 B) $10,000 C) -$20,000 D) $20,000 E) $5,000