问题如下：
Analyst collected the financial information about PZ company in the following table:
Analyst also collected the cash flow information about PZ company in the following table:
The CFF includes cash paid for interest of 1260 and the CFO includes taxes of 1850 in 2018, based on the ratios for operating cash flow before interest taxes to operating income in 2018, the results should describe as:
选项：
A. PZ’s earning are not backed by cash flow
B. PZ’s earning are backed by cash flow
C. no conclusion
解释：
B is correct.
考点：operating cash flow before interest and taxes
解析：
Operating cash flow before interest and taxes=CFO+支付利息的现金+支付税的现金，这一题比较特殊，因为题目中说interest是属于financing activity的，不属于CFO，所以它没有在CFO中扣除。既然它没有在CFO中扣除，那也就不需要加回了，只需要加回tax即可
Operating cash flow before interest and taxes=8850+1850=10700
将其除以EBTI得到：10700/4579=2.34
计算结果是大于1的，说明公司的earning质量较高。
既然是CFO+int+tax，那么不应该是加回吗？1850已经在里面了就不用加了吧，应该加回的不是1260吗？所以应该是（8850+1260）/4579吧？
