CVS- They owed me!

Went to CVS today on my lunch break (as usual) and here is the breakdown:

$1.00- 1 Carefree liners
$4.98- 2 Right Guard deodorants
$4.99- 1 Kotex U pads
$7.38- 2 Stayfree pads
$8.99- 1 Schick Hydro razor

-$13.50 in ECB I had
-$1 for Carefree (making it free)
-(2)$2 for Stayfree (it was a money-maker after coupon and ECB!)
-$1 for Kotex (it was a money-maker after coupon and ECB!)
-$3 for Right Guard (it was a money-maker after coupon and ECB!)
-$5 for Schick (free after coupon and ECB!)

My total came to -$1.79. CVS does not give cash back, so the cashier voided one of my ECBs and I put $1.21 on a gift card.

From this transaction I received $17 ECB!