Good to know that it works well for that.

>I'm not doing complex formulas

Neither am I frankly. Finance stuff can get conceptually complicated even with simple addition & multiplication though. e.g. I deal with a lot of offshore stuff, so the average spreadsheet is a mix of currencies, jurisdictions and companies that are interlinked. I could probably talk you through it high level in an hour with a pen & paper, but the LLMs just can't see the forest for all the trees in the raw sheet.