Operator
MarginGauge is operated by Dong Yiming (董一鸣), an individual based in Tianjin, China.
What to include
For a calculator issue, describe the selected mode, calculation basis, and visible error code. Do not send customer names, addresses, order IDs, Etsy credentials, or other personal information.
Response scope
MarginGauge can investigate product behavior and source evidence. It cannot provide accounting, tax, legal, or individualized marketplace advice.