The marginal cost to a grocer of selling avocados, which would ...

[jeatrice]

The marginal cost to a grocer of selling avocados, which would have to be thrown away if they are not sold immediately, is approximately
 
  A) the overhead cost per avocado sold.
  B) the price of replacing the inventory.
  C) their wholesale purchase price.
  D) zero.

Question 2

In the above figure, x is
 
  A) positively related to y and negatively related to z.
  B) positively related to both y and z.
  C) negatively related to y and positively related to z.
  D) negatively related to both y and z.

[stillxalice]

Answer to Question 1

D

Answer to Question 2

C