I do try and use a coupon on everything I buy and also buy it when it is on sale. Doing this gets the most bang for your buck. I am attaching a picture of the savings on my receipt with the total items purchased. On the receipt you will see where it says "Your Kroger Savings Today." In that section it tells you your manufacturer coupon savings, bonus coupon savings (from doubling), Kroger Plus Savings (normally the biggest amount) and the Total Savings with percent of savings.
Also watch the fuel points at the bottom of the receipt This gets you 10 cents off per gallon of gas at Kroger Stations and Paducah's Pockets (Exit 3) for every 100 points.