Besides the basic income/expense numbers, I'd recommend only keeping what needs to be used for evaluating whether to use the same company or not next time. We only keep the income/expense numbers for tax purposes and no backups.

How much info should the treasurer keep for each fundraising event such as Holiday Flower Sale, T-shirt sale, Fund run, etc. I do include all numbers with the budget and cash flow statement. What I'm asking is in regard to the backup media.
I'm unsure as to how detailed we need to be. :confused: Thanks!!