Microsoft Excel：使用“ OR”函数比较非数值

Question

I'll get right to it. I've included a screenshot to help out with this question.

Look at cell J24. I need to write a formula that does the following:

If I24 is equal to "NA", then J24 needs to say "NA". If I24 is equal to "ND", then it needs to do a calculation, I I24 is a number, then it needs to do a different calculation. I was thinking something like this:

IF(I24="NA", "NA", IF(I24="ND", $E$22-H24, IF(ISNUMBER(I24), ($E$22-H24+(0.84*I24), "ERROR")))

I don't think this works though because of the last step in my argument. Earlier in the equation I basically have this check to see if a cell is equal to "NA" or "ND", which are both non-numeric. Later in the equation, I have something that's checking whether or not the cell is non-numeric. So basically, it's going to get to the last part of the equation and say "Oh, I see it says "NA" or "ND" instead of a number, so I'm going to return "FALSE". Do I just need to rearrange the equation? Use the AND or OR function with this IF statement? And if that's the case, how in the world do I combine all these?

I've been trying to figure out how to use the IF function with the OR function by saying something like "IF(OR(I24<>"NA", "ND"), I24, "FAIL). Is that how you would say "If I24 is not equal to "NA" or "ND""? Or do I have the syntax wrong?

Answer 1

Okay, so I actually figured out the answer with a little bit playing around. This is how it should go:

IF(ISNUMBER(I24), ($E$22-H24+(0.84*I24)), IF(I24="NA", "NA", IF(I24="ND", $E22-H24)))

I guess what I was trying to figure out at the same time is, why can't you have a function that says:

IF(OR(I24<>"NA", "ND"), I24, "ERROR")

Isn't that how you say "If I24 is not equal to "NA" or "ND"??? It gives me an error when I try that and says " #VALUE ".

I know it's not quite related, but it is something could be useful in the future if I'm filling out these spreadsheets and I don't have "NA" or "ND".