Why did RW and Melvin want TJ to to the mercantile?

RW and Melvin wanted TJ to go to the mercantile to buy supplies, likely because they needed items that were essential for their daily needs or activities. They may have also seen it as an opportunity for TJ to contribute to the group or to gain some independence. Additionally, sending TJ could serve to reinforce the group's dynamics and relationships, as they relied on each other for support and collaboration.