마진계산기 (Margin Calculator) is a free Chrome add-on developed by 11kkw17. This handy tool allows users to easily calculate margins for various purposes. Whether you're a seller looking to determine shipping fees or offering free shipping, 마진계산기 can help simplify the process.

With 마진계산기, you can calculate the shipping fee from the perspective of the seller by inputtingIf you're offering free shipping, simply enter 2500 as the shipping fee. This flexibility makes it easy to adjust calculations based on different scenarios.

Overall, 마진계산기 is a useful tool for anyone needing to calculate margins. Its simple interface and intuitive functionality make it a convenient choice for Chrome users.