Question 1030638
P=k((1+r/n)^nt-1/(r/n), where k is what is deposited each month and P is what you want at the end.  r is the rate, and n is the number of compoundings per year. Don't forget the minus 1 in the numerator.
25000=(k(1+.08/12)^60-1/(.08/12)
multiply through by (.08/12)
166.67=k (1.0066670^60)-1.  Don't round until end
divide through
$340.25 per month
the amount being deposited is not enough.
P=275(0.48984571)/(.08/12) will give $20,206.14