Couple of questions regarding numbers. I have never used it so I am a novice. My main question is will Numbers sync between my devices and my Mac? My wife and I keep a credit card spreadsheet (excel) on the Mac and we constantly have receipts piling up. I would like to be able to enter info in a spreadsheet on my phone and have it sync to her phone and my Mac or vice versa. Is this possible? I don't want to pay for numbers on the devices and my Mac if they won't sync. Thanks.