Johnny owns an annuity that provides him with payments at the end of every two months, beginning on February 28, 2010. The first three payments are $75 each, the next six payments are $50 each, and the last three payments are $25 each. Assume that the interest rate is i(6) = 12% throughout the term of the annuity. After the final annuity payment, the interest rate changes to i(6) = 8%. Find the value of the annuity on June 30, 2013.