Nature Valley Granola Bars @ Safeway - <$.50 per box - YMMV

We love the Nature Valley Sweet & Salty Peanut granola bars and so when I can find a deal I stock up. Maybe some of you would like to do the same. In this week's safeway ad (CA - Bay Area) there is a coupon for 4 for $6 (good thru 8/18). safeway's website also has printable $.40 off coupon (I think some other sites have this coupon too)--as of now, print limit has not yet been reached. Finally, effective 8/14--9/6, you get a coupon toward a future safeway purchase (like register rewards) by purchasing various quantities of the bars ($2.50 back for purchasing 4). So I purchased 4 boxes for $6, less 4 x $.40 in coupons makes $4.40, plus $2.50 coupon toward future purchase for an effective net price of $1.90 for 4 boxes (24 bars total, about 8 cents per bar). Don't know if this deal is just regional. I plan to do it a couple more times before Tuesday.