Safeway has their Kraft Singles (16 oz, 24 slice packs) on sale for $1.99 - regular price $4.99. Right in the dairy section, there are free "Add Dairy to your backyard adventure" booklets with coupons on the back... including one for $.50 off Kraft singles. Since Safeway doubles coupons up to $.50 (use the little coupon in the add) - you can get these for $.99.
We've been getting 2 each time we go. We usually get the 72 slice boxes at Winco for between $6-7. At this price, 72 slices are $2.97!
I don't know if these other stores double their coupons like Safeway, but Safeway's sister stores are: Vons, Dominick's, Genuardi's, Randalls, Tom Thumb, Pavillions, and Carrs|Safeway. According to the coupon booklet, it is available at all these stores. There are also coupons for $.50 off Kraft Natural Shredded Cheese, $.55 off Daisy sour cream and $.50 off 2 1.75 liter Simply Orange Juice. All but the sour cream are elligiible for doubling.