Walmart offers the Pure Garden 12x12" Interlocking Floor Tiles 6-Pack in Terracotta for $9.98. (Amazon charges the same with free shipping for Prime members.) Choose in-store pickup to avoid the $5.99 shipping fee. That's the lowest price we could find by $4. They're designed for use on patio, deck, and garage floors to provide water drainage.
Before you send in your tax return, double-check that you haven't made one of these mistakes that can trigger IRS scrutiny.