Am I stupid?? Cassiopus EASY

[pnmoss]

13212E24390225212E400 wrote:
I have gone through everywhere Jack can think of to use these wonderful SEVEN red keys I have found, and simply cannot find a way to where we're supposed to use them !!!!

Any help would be greatly appreciated  ;D
Thanks so much in advance !

Actually, you need 8 for maximum monetary gain, and you'll know where they're needed by the time you've finished the mansion. I guess that sentence sounds snooty, but it's meant as a hint. Good luck.

Seawinder