Sam's Club also has it for $14 + $1.40 non-member handling fee = $15.40 with free store pickup.
Provides 15-minute results without sending to a lab.
Walmart has the 2-Pack of InteliSwab COVID-19 Rapid Antigen Tests for $14 with free shipping with Walmart+ (free 15-day trial), $6 shipping, or free shipping on $35+.
Add to cart to see discounted price; price varies by region (YMMV). Walmart has the Robitussin Maximum Strength Cough & Chest Congestion DM Liquid Medicine (4 Fl Oz) for $0.98 with free in-store pickup or free shipping on $35+. Suitable for adults and children 12 years and over.