You will just have to put your trading details i.e. Transaction Type (buy/sale), Date & Time of Transaction, BTC Quantity in columns A:D and sheet will automatically calculate FIFO gains and other important data for every row. You will see Gain/Loss after every transaction on FIFO basis in column U. Besides this, spreadsheet will also show you other important data e.g. Cumulative Cost of BTC Purchased, Cumulative Earning from sell of BTC, Total BTC Purchased, Total BTC Sold, BTC in Hand after every transaction.
Columns P, Q, R and S contains formulas for calculating costs of coins sold in parts. These formulas are complex and doing the calculation on FIFO method. These contains intermediate results. You may show or hide them as per your choice.
You can set exchange commission for buy or sell transaction in 2 ways:
First method is to set a fixed percentage for all Buy and Sell transactions in cells B1 and B2. It will be used to fill amount of commission (in USD) for each transaction in column F and remove values from column E.
In second method you can manually fill amount of variable commission (in USD) for each transaction in column E. In that case, value in column F will NOT be used by sheet.
Formula to calculate Effective Price after Commission in column G will first look for commission amount in column E. If it is blank, then commission amount from column F will be used (which itself is derived from %age values from cells B1 and B2).
You can adopt both the methods together, but remember that value in column E always takes precedence over column F.