Quick Dollar General Trip, HUGE savings!

I stopped into Dollar General as it was the last day of their pre-Thanksgiving sale. 
I got:


8 Cans of Libby's vegetables, on sale for 40 cents a can, normally 85 cents a can. 
3 Glade Plugins Holiday Refills with free warmer. on sale for $1.67 each, normally $3 each. 


I used the following coupons:
2- $1/4 Libby's Canned Vegetables 11/13/2011 RP Insert (exp 3/31/2012)
1-  $3/1 Glade Plugins Scented Oil Warmer
1- $1/1 Glade Plugins Scented Oil Refills


My total: $2.55. 
Total savings: $13.25  
A savings of 84%