I tried one of my points and it was wrong. can someone help me find my mistake?

21.00 per mile and plus 5.50 is 26.50 i think that im pretty sure it is right

This is what i found “an explicit formula designates the nth term of the sequence, as an expression of n (where n = the term's location). it defines the sequence as a formula in terms of n. this example is an arithmetic sequence(the same number, 5, is added to each term to get to the next term).” i hope this you for what your looking for. can you plz mark me brainliest?