Mr. Wilk is a high school math teacher whose salary is $33,660 for this school year, which has 180 days. In Mr.Wilk’s school district, substitute teachers are paid $85 per day. If Mr. Wilk takes a day off without pay and a substitute teacher is paid to teach his classes, how much less does the school district pay in salary by paying a substitute teacher instead of Mr. Wilk for that day?
A. $57
B. $85
C. $102
D. $114
E. $187