成功哪有看起来那么容易？在备考的路上，最有希望通过的人总是最孤独的。这个时候，只要我们坚持初心，持之以恒，才能滴水穿石，获得最终得突破。每日坚持练习两道acca考试题目，坚持下去，你会发现一个不一样的自己~
1.【单选题】
Which one of the above graphs may illustrate a step fixed cost - when the vertical axis represents cost incurred?
选项：
A. Graph 3
B. Graph 4
C. Graph 5
D. Graph 6
2.【单选题】 Amy company has recorded the following data in the two most recent periods.
| Period | 1 | 2 |
| Total production costs ($) | 28,176 | 31,046 |
| Level of activity (units) | 5,520 | 6,340 |
What is the best estimate of Amy's fixed costs per period?
选项：
A. $8,856
B. $8,556
C. $8,566
D. $8,586
