Table 10-2 Table 10-2 Above Shows Keira's Utility from Soup and Sandwiches.The

Multiple Choice

Table 10-2

Table 10-2 above shows Keira's utility from soup and sandwiches.The price of soup is $2 per cup and the price of a sandwich is $3.Keira has $18 to spend on these two goods.
-Refer to Table 10-2.What is Keira's marginal utility per dollar spent on the third cup of soup?

A) 72 units of utility
B) 36 units of utility
C) 12 units of utility
D) 6 units of utility