Sept/Dec 2015 question 3

Hi, Question related to reduction in trade account receivable. Is it correct to deduct the discount from the first section of the answer below and not to deduct in the second ? 1) revised Trade receivable taking discount = ''($28,800,000 - $108000)'' * 75% * 30/360 = $1,793,250. ($108000 is the discount) 2) revised Trade receivable not taking discount = ''$28,800,000'' * 25% * 51/360 = $1,020,000 Total revised trade receivable = $1,793,250 + $1,020,000 = $2,813,250 Current receivable = $24m * 51/360 = $3,400,000 Reduction in receivable = $3.4m – ($1,793,250 + $1,020,000) = $586,750 Finance cost = $586,750 * 4% = $23,470 The examiners answer is $23,200. Kindly advice