Units of Good Consumed 1 2 3 4 5
Total Utility (utils) 50 (A) (B) 125 (D)
Marginal Utility (utils) 50 45 20 (C) 7

Refer to Exhibit 21-4. What value goes in blank (D)?
a. 118
b. 25
c. 111
d. 132
e. There is not enough information to answer this question