Free Purex at Fred Meyer

Fred Meyer has a coupon out in their weekly ad from Sunday's paper (which can also be picked up at the CS counter in the store) for Purex laundry detergent for $1.99. You can reportedly buy 2 of these at $1.99 and get a $4.00 Catalina coupon (that is a coupon that prints out with your receipt). You can then walk out of the store, back in, and do that same deal again using that $4 to purchase two more Purex with the ad coupon. I have not done this deal yet myself, but have heard from others that have said this works!