Testing a Portfolio tracker on Google sheets – am I getting correct results?

Just wanting to check things like my average cost basis, total cost basis, unrealised / realised gains etc are calculating correctly. For ease of mind I just wanted to use the average cost basis method, rather than FIFO for figuring out gains.

Absolutely new to this so any help is greatly appreciated, thanks!

https://docs.google.com/spreadsheets/d/1VFl6jDDTnJvEKD6LyqytJAC-dS7P13rJ_HFlrW83kfU/edit?usp=sharing