CoinTracker gains calculator malfunction, how to fix

[saalei]

I am trying DESPERATELY to find a spreadsheet that calculates my gains/losses for my tax return! Please help!

CoinTracker seemed like the best option but it has a glaring fault which is that it calculates the "gains" of the TRANSACTION FEES and doesn't give a crap about the actual TRADES! Does anyone know how to edit out the transaction fees from a .CSV file so I can spoonfeed CoinTracker with only the relevant information since it seems too stupid to actually do its job?

Alternatively, does anyone have a spreadsheet which calculates FIFO gains/losses if I input the data? It must be able to be opened in LibreOffice because I use LInux! Thanks.