User blog comment:HTF1234/Happy Tree Friends Adventures RPG: The Fire Point (v1.0.0 release)/@comment-28713855-20160218002923/@comment-4834197-20160218035756

When making a new event, there should be an option like "Shop Processing" in the Screen Controls section (located in the third tab). From there, you can add the items on sale. That's all. The rest of the shop's main functions are handled by said event command, so based on what I mentioned before, you simply select the shop event command and add the items on sale.