Quick answer
MSRP, wholesale, and net receipts are different bases. A royalty percentage has meaning only with its defined base; advances are commonly recouped against future royalties.
Creator workflow
Capture the actual specification, quote, or platform setting for your project, then use the related calculation with those values rather than a generic market assumption.
Common mistakes
Do not treat a category label, supplier term, or platform policy as a universal product specification. Confirm the current version, territory, and contract terms that apply to you.
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Limits
This is educational planning material, not supplier, legal, tax, or platform advice.