Matt Is Offered a Job Driving the Campus Shuttle Bus

Matt is offered a job driving the campus shuttle bus from 4 P.M.to 6 P.M.each Monday.His reservation wage for this job is $7/hour.
Now suppose the director offers Matt $50/hour,but also announces that the earnings from the job will be divided equally among Matt and the 99 other students who live in Matt's dorm.How much economic surplus will Matt enjoy now for accepting the job?

A) $0.50
B) $1.00
C) -$6.00
D) -$6.50