The answer is $530.18. If theres a way to use a formula instead of 14 year chart, that would be much appreciated. Please show steps on how to get answers.

(3) An amortized loan is repaid with annual payments which start at $400 at the end of the first year and increase by $45 each year until a payment of $1,480 is made, after which they cease. If interest is 4% effective, find the amount of principal in the fourteenth payment