Homie Gear via eBay offers the Dickies Short Sleeve Mini Pique Polos in Black, Navy, and Grey for $9.99 with free shipping. Outside of the below mention, that's the lowest total price we could find by $10. It's available in sizes M to 5XL, although not in all size/color combinations.
A close price: Amazon offers it for $10.66 with free shipping for Prime members.
Before you send in your tax return, double-check that you haven't made one of these mistakes that can trigger IRS scrutiny.