SUM function not working correctly (not a rounding issue)
OK.
So in the E-column, I have a list of statistics going from E4 through E11. E12 is supposed to give the sum of the preceding numbers within that range.
E
4 34000
5 7000
6 7000
7 30500
8 7000
9 3000
10 0
11 1500
The sum of these numbers should appear in the next row, E12, where I have the formula: "SUM E4:E11". However, whereas E12 should be giving me $91,000, it's instead giving me $57000. There's nothing that I can see that is wrong with my formula. If I modify one of the cell amounts, the 57000 will change by the amount I changed the cell. But there's no reason on earth it should be giving me 57000. I thought maybe there is an issue with how large a cell number can be, but if I change the 0 to a 1 in E10, it outputs 57001 to E12.
iBook, OS X Mavericks (10.9.1)