CVS savings

Casey and I went grocery shopping last night and we had to pick up my prescription from the pharmacy. I went in and Casey came in a few minutes later. He wanted to look around, he ended up wanting to pick up a few things. I told him that I get extra bucks if we buy certain things. He still can't figure that out.
Anyway we ended up spending a total of
$46.61 before coupons and a gift card that I had that had $3.56 left on it.
Total of items
$46.61

$30.80 in coupons and gift card

$16.54 with tax out of pocket
I got 2 items free.
Since I can't drive and Casey has to take me shopping I'm hoping I can teach him how to shop at CVS and save.