::
In my opinion, if the Net Book Value is 150k and you sell it for 50k, You receive a cash flow from investments of 50k that increases your Cash Asset in 50K but the decrease in the Property Plant and Equipment Asset is 150k, so the total decrease in assets is 100k. That should be reflected as a loss of 100k (non monetary loss) that will decrease the Net Income in 100k so it will be reflected in the Equity of the balance sheet. That will close the loop.