Ben's business generates an average of $1,500 per month in internet sales, along with an additional $250 per salesperson per month. Considering the inequality below, how many salespeople, represented by 's,' are required to be working for Ben's business to generate at least $2,750 in monthly revenue?
The inequality is: $1,500 + $250s ≥ $2,750
a. s ≥ 5
b. s ≥ 15
c. s ≥ 7
d. s ≥ 10
