James McCulloch purchased a 30-year U.S. Treasury bond four years ago for $1,000. The bond paid 3.125 percent annual interest. Four years later he sold the bond for $1,040.

(a) What is the annual interest amount for the bond? (Round your answer to 2 decimal places.) Annual interest $

(b) What is the total interest Mr. McCulloch earned during the four-year period? Total interest $

(c) What is the total return for Mr. McCulloch's bond investment?