Save even more with the Buy 5 and get 1 FREE! Example: 5 qts X $19.95 = $99.75 plus 1 FREE 6 qts divided by $99.75 = $16.62 per qt YOU SAVE $3.33 per quart! Example: 5 units X $39.95 = $199.75 + 1 FREE 6 units divided by $199.75 = $33.29 per unit YOU SAVE $6.67 per unit! Ordering instructions for the Buy 5 get 1 FREE: Step 1..order 5 quarts or 5 air freshener units (can't order 2 units and 3 quarts to make 5, must be 5 quarts and ,or 5 units) Step 2..Check out Step 3..After you check out there will be a COMMENTS/SPECIAL DELIVERY INFORMATION box. It is located below the Grand Total amount. Step 4..Type in your free selection. If you ordered 5 quarts, type in the the comments box the name of the 6th quart you would like for free. If you ordered 5 air freshener units, type in the comments box the type (battery or electric) and color of air freshener unit you would like for free. Don't worry, we process each order and would catch any mistakes.