Use a calculator to evaluate an ordinary annuity formula for m, r, and t (respectively). Assume monthly payments. (Round your answer to the nearest cent.)

$150; 8%; 35 yr
Answer = $12.87 but I am wrong can u please help?

Your question makes no sense to me

What is $150 ?
Is the 8% rate compounded monthly?
What is the $12.87 supposed to represent?
You did not define m, r and t