Changing Apple ID in iCloud setup on iPad
Is there a way to change the iCloud Apple ID I entered by mistake when I set up my iPad on IOS5? I have 2 Apple ID's and am using one for purchases in the store and one for iCloud. Not understanding the process at the time, I inadvertently entered the store ID in the iCloud field on setup of my iPad. Now it will not allow me to change it. When I click on iCloud in Settings, the Apple ID is greyed out. If I leave it this way, my data will not sync in iCloud with my Mac and iPhone that have the other Apple ID for iCloud. I considered clicking on "Delete Account" but didn't know if that would delete my entire Apple ID or just delete it for this particular part of the setup on this device, allowing me to enter a new Apple ID. The latter seems unlikely as I would just think they would allow you to select and change it if that were an option. I can't find a telephone number to call Apple for this issue. Thanks for any help anyone can offer.
iPad, iOS 5