SUM not working correctly
I am having a frustrating issue with the SUM key not adding my numbers correctly (or at all).
I double tapped the cell below the numbers I wish to add and went to = and then hit the sum key. The formula is SUM C2:C19 but it's only inputting the C2 number in the SUM cell.
I could go through one by one and add up each cell manually in the formula but it would be much easier to use the SUM key if I can. I'm just wondering why it's not working like I think it should. Any help would be appreciated. Thanks!
iPad (3rd gen) Wi-Fi + Cellular (VZ), iOS 5.1.1, 64GB Black