• Want to manage sales on Mercari, Rakuma, Yahoo! Auctions, etc. using paper • Dislike managing things with smartphones or apps, and want to organize by hand • Want to understand profit calculations at a glance • Want to manage purchases and sales together • Looking for a simple and easy-to-read management sheet 15 sheets / 1 set. Instead of a smartphone, PC, or data, it's handwritten so you can always see it, and visualize it by coloring in the pie chart at a glance! Please consider it. m(_ _)m