You have assumed they all go in there.
First, the net income is used ONLY in the operating section and ONLY for indirect method. The operating section is about the day-to-day operations, which is much or mostly what net income is about. So it starts with net income and makes a series of adjustments to get it back to cash and get rid of some things which don't belong.
Assets are considered what you have invested in. So activities involving assets are the investing activities. This does not include current assets, because those are basically tied up in the operating activities.
Liabilities and Equity are how you finance a company, so that is the financing activities. Again, this does not include current liabilities except dividends payable (related to stock).
So in short, think of the left side of your accounting equation as investing, and the right side as financing. But dump out the current assets and current liabilities.
Both investing and financing are DIRECT method. This means you are showing directly where cash came from and where it went to. Depreciation isn't cash. Even though depreciation is relating to your plant assets, it's not cash.
Losses are not a direct cash -- that is, any loss or gain is
already included in the cash from the sale. If you sell something for $1000 and that's a $100 gain, the $100 is already in the $1000 of cash you report. If it was $100 loss instead, you didn't actually get cash from the loss, but you
also did not give out any cash for the loss. It simply doesn't exist in the cash at all. Therefore a loss is not a negative cash flow.
(Do not confuse any of the above statements with the set of adjustments you make in the operating section. If you do an indirect method, that is an entirely different concept. There is an illustration of that here:
Principles of Accounting Chapter 16)
Linear Mode
