Cost Basis (manual compute question)

[Gus Gustafson]

I have sold some shares of an equity, but not all. I want to manually verify that I have entered transactions in a way that allows GnuCash to report a correct Basis on the remaining shares. Can anyone confirm my understanding is correct?:

Basis (of remaining shares after a sale) = Money In + Income + Commissions - Money Out + Realized Gain