46. Mr. Leff received a $6,200 grant from a local university for the fall of 2020. Mr. Leff was a candidate for a degree, and was required to be a research assistant, for which services he received payment under the grant. The $6,200 grant provided the following: Tuition Books and supplies Pay for services as research assistant $3,600 $ 500 2,100 Mr. Leff spent the entire $6,200 on tuition, books, and supplies. What amount must Mr. Leff include in his income for 2020? a. $2,100 b. $2,600 $3,200 d. $3,600 C