IF calculation problem

[JRRT]

I am new to excel and am trying to us the IF function to do a calculation.
The calculation will be done in D3 What I want to do is if the letter "I" is typed in B3 it should divide the value that is entered in C3 by 2.5. Or if the letter "D" is typed in B3 it should divide the value that is entered in C3 by 1.5. Is anything like this possible?

 

[Jay Petrulis]

Hi Dave and JRRT,

Dave - nice one.

Just a warning, be careful here. Make sure your result is exactly as you want it.

If the SUMPRODUCT returns zero, your result will be the value in B21.

Suppose, however, that B21 is a value greater than any individual item in the list. The result might be negative if the SUMPRODUCT total returns a value greater than B21.

I read the OP's intent to be:
1. Identify (D,E) series that match criteria.
2. Subtract each result from B21.

Obviously, I may have misread the question, but these two formulae (I posted to the other thread) both work, yet can return vastly different results.

BTW, I did not get the original IF statement (array entered) to return the correct results.

Bye,
Jay

 

[Yogi Anand]

Hello Dave, JRR, and Jay:
since we are talking about different approaches, and Dave's progressively smaller and smarter solutions, how about the following array formula:

{=B21-SUM(IF(E3:E17=E3,D3:D17))}


Regards!