題目:A buyer borrows money at 12% interest to pay a $4000 invoice with
term 1/10,n/30 on the 10th day of the discount period. The loan is
repaid on the 30th day of the invoice. What is the buyer's net
savings for this total events?
(A)$0 (B)$13.33 (C)$13.6 (D)$26.67
個人想法:這題題目我看不是很懂,我自己的想法是認為他可能在問隱含利率,
我的算法3960x12%x20/365=26.0383
40-26.0383=13.9617
可是沒有這個答案,是我誤會題目的意思嗎?

你可以試試看用360天算唷=))