Of course, the store manager told me there are no special offers for Black Friday. For all I know, they just wanted to get the sale right then. I just want to be sure before is jump into a big purchase.
I was told by a cashier that I couldn't use both coupons, so I went to the service desk and asked if I could use both. They said it wasn't a problem because one was a store coupon and one was a manufacturer.
The moral of the story is keep trying until someone says yes!