A retail outlet offers a retention bonus for each shopping season an employee remains with the company. Samuel’s starting pay is $12.50/hr. For each season Samuel remains with the company, he receives a $0.35/hr raise. Find f(n), Samuel’s hourly rate after n seasons with the company. Then determine his hourly rate after 18 seasons.

f(n)=
After 18 seasons with the company, what will Samuel’s hourly rate will be $ /hr. (Round to the nearest cent.)