Amazon has the 3-Pack Sensodyne Sensitivity & Gum Whitening Toothpaste (3.4oz tubes) on sale for $13.78 - 5% off with Subscribe & Save (can cancel anytime) - 20% off (check “Save an extra” box, eligible on first S&S order for this product) = $10 with free shipping on $35+ or with Prime. Roughly $3.44 per tube.