Everybody should really check his or her credit card transactions. To make a long story short, Staples charged me the full amount. I called them and the CS said only one coupon was allowed whatsoever. I told them that when I placed the order on the phone, they took all coupons and even quoted me the final cost. No matter, she said. I asked for the supervisor and she was more agreeable; but she said that for future reference, only one coupon can be applied regardless of the nature of the coupons or rebates. I asked her specifically: Does that mean one cannot combine a dollar-off coupon with a manufacturer's rebate? Her answer was yes, it means that you cannot combine the dollar off coupon with a manufacturer's rebate. Sounds counter-intuitive to me, but she was nice and did promise to credit my CC. But I thought people here might want to double check the charges themselves.