Raphael bought $15,731worth of stock on margin. The initial margin was 68% and the maintenance margin was 28%. Unfortunately, actual margin decreased to 18%. Raphael deposited enough cash to raise the margin to 36%. Rounded to the nearest penny, how much cash did Raphael deposit? Enter your answer with two digits after the decimal place (e.g., 123.45).

Answer is 1,726.57. Please Explain :)