Note: Please use the Financial Mathematics formulas and don't use excel for this question. I'd be appreciated if it is not calculated by each year. This question is in the book "Financial Mathematics for Actuaries" so I need answer according to it. I'm currently studying for e-xam FM so any related formula would be appreciated. Thanks a lot.

Answer: $21,154.84

$1,400, 2.36 Find the present value of monthly payments of $2,400, $2,300, $1,300 commencing at time 0 at d(12) = 12%