メルカリ超かんたん計算機 (also known as Mercari as CSV) is a free Chrome add-on developed by NRS systems. It falls under the category of Browsers and specifically the subcategory of Add-ons & Tools.

This program allows users to collect information from Mercari's sales and purchase pages and aggregate it into a CSV sheet for easy download. When viewing the "Sold" page of your listed items or browsing your "Purchased" items on Mercari, a "CSV" button will appear. Clicking this button will aggregate various parameters of the displayed products, such as their names and prices, into a CSV sheet.

It's important to note that this program cannot aggregate data for items that have already been deleted.

With Mercari超かんたん計算機, users can conveniently organize and analyze their Mercari transaction data in a simple and efficient manner.