Walmart FREES and CVS

I've made a couple shopping trips and managed to find an Elmo restraunt play set for $25!(clearance...at Christmas this was $120 at ToysRUs).
The only things I've bought were free+ overage
10 Diego Bandaids(clearance) -5 $3/2 blinkies=FREE
2 boxes Glucerna cereal $3.94-2 $5/1 printables=FREE+overage
1 Old El Paso dinner kit $2.96-FREE=FREE
4 Cascade dishwasher rinse $3.13-4 FREES(homemade simple booklet)=FREE
Retail:$35.16 My Total:FREE(no tax?)

CVS(had ECB to burn)
1 Energy shot $4.99-5 ECB=FREE
2nd trans.
2 boxes vanilla wafers $4.49-BOGO=$4.49
2 v-day candy clearance $.25ea
-4.99ECB
Retail:$15.97 My Total:FREE(no tax?)