Jabari is power washing houses for a summer job. For every job, he charges an initial fee plus \$30$30dollar sign, 30 for each hour of work. His total fee for a 444-hour job, for instance, is \$170$170dollar sign, 170. Jabari's total fee, fff, for a single job is a function of the number, ttt, of hours it takes him to complete the job.
Write the function's formula.