The Mr. SNRUB thread's been locked, but I can't let this bit of misinformation go. 
Someone started a trivia quiz, and asked what the cash register says when Maggie is scanned in the opening credits, and someone answered NRA4EVER. That was just a joke in the episode where that was asked. It actually says $847.63. The price Matt Groening spent on his newborn baby in the first month.

Someone started a trivia quiz, and asked what the cash register says when Maggie is scanned in the opening credits, and someone answered NRA4EVER. That was just a joke in the episode where that was asked. It actually says $847.63. The price Matt Groening spent on his newborn baby in the first month.