Pete's putt-putt golf charges $8 per person for their first round of golf. each extra round is $5 per person. rick and his 3 friends have $92 to spend on putt-putt.

which of the following inequalities could be used to solve for r, the number of extra rounds of putt-putt they can play?
a $13 + $4r ≤ $92
b $32 + $20r ≤ $92
c $52r ≤ $92
d $24 + $15r ≤ $92