Jeffrey Dean, a Master’s Degree candidate at North State Central University, was awarded a $15,000 scholarship from North State Central in the current year. During the current year, he paid the following expenses:

Tuition..........................................$12,000
Books................................................1,000
Fees......................................................500
Room & Board.................................1,500

In addition, he received $6,000 for teaching two undergraduate accounting courses. What amount must be included in Dean’s gross income?

a. $0

b. $6,000

c. $7,500

d. $21,000