# Help with Calculations using IF - THEN - ELSE ?

Hello - I have looked at documentation online till I'm blue in the face, and I'm missing something. I'm pretty sure what I want to do is fairly simple, however I just haven't gotten it yet. So - here's what I want to do. I have a spreadsheet that the value of a given cell will be calculated depending on the value of one of two other cells in other columns. For example, there will be a numeric value in either cell C10 or cell F10, and the result will be in J10. If C10 has a number, one calculation will be performed for J10. If F10 has a value, J10 will have a different calculated result. There will never be numbers in C10 and F10. If both are blank, J10 should remain blank as well. Again, it seems like it's pretty simple and straight-forward, but I apparently have a mental block! I started with, IF C10>10 ... I'm able to do the calculations separately; in other words, I can have J10 show the correct result if I only have my formula in C10, OR, if I have my formula in F10. So, I need to combine the two, again, leaving J10 blank of both C10 and F10 are blank. Any insight would be greatly appreciated! HELP!!!