求教 急 2011 CFA level 1 Sample question 38 effective, commitment, commission, 2011, commercial

datuocai

Based on a need to borrow 2$ million for one month, which of the following alternatives has the least expensive effective annual cost?

1. A banker's acceptance with an all-inclusive annual rate of 6.1%
2. A credit line at 6% annually with a 0.5% annual commitment fee
3. commercial paper at 5.9% annually with a dealer's commission of 3000$(or 0.15%) and a backup line cost of 4000$ (0.20%)

求问各位高手此题该怎么解呀？答案是a,可是答案上字体太模糊看不懂呀。

多谢了。请给过程！！