RMontgomery

--> Q13:

- if it helps at all: try to remember, that your change in WC can also be calculated using current assets and liabilities as done in this example (there are plenty of WC topics that discuss the different formulas and possible confusion about it).

- As far as your FCInv of 38 goes: recall that FCInv = Increase in Gross Fixed Assets. Gross FA = Net FA + Acc. Depreciation. In this Question they give us Net FA, so taking the difference is not enough, we have to include the depreciation accumulated in the current year as well. so youll have to add the current depreciation expense to the current Net FA and subtract last years Net FA. Mathematically speaking (Change Gross FA) = (Change Net FA) + (Change Acc. Depreciation). Change in Net FA here is 489-474 = 15 and Change Acc. Depreciation is the current expense of 23 --> 23+15 = 38

But for simplicity, it was also given at the bottom of the page like its been said above.