问题如下：
Standard Corporation is investing $400,000 of fixed capital in a project that will be depreciated straight-line to zero over its ten-year life. Annual sales are expected to be $240,000, and annual cash operating expenses are expected to be $110,000. An investment of $40,000 in net working capital is required over the project’s life. The corporate income tax rate is 30 percent. What is the after-tax operating cash flow expected in year one?
选项：
A.$63,000.
B.$92,000.
C.$103,000.
解释：
C is correct.
The annual depreciation charge is $400,000/10 = $40,000. The after-tax operating cash flow in Year 1 should be
CF = (S – C – D)(1 – T) + D
= (240,000 – 110,000 – 40,000)(1 – 0.30) + 40,000
= 63,000 + 40,000 = $103,000
助教老师：
An investment of $40,000 in net working capital is required over the project’s life.
这个题干中的给法，是说over the life 而不是在项目之初，是指每年都会需要投入一笔吗，为何在每年计算现金流的时候不需要考虑呢？
