I've not found qualified information about a modification or contribution for customizing sales reports.

If someone has comments on this subject, information to share, a contribution I could check out, personal experience, etc. I'd love to hear about it.

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**Please DO NOT speculate or send me to a link you've found via Google as if it were an authoritative answer. I want legitimate personal experience. Commentary is fine, suggestions are fine, but clarify that you do or don't know what you are talking about. Just naming a broken contribution is not helpful.