Need a book order formula which counts all students but results in zero if no textbook is needed

[djaida]

Hello all,

I hope the thread title makes it clear what kind of formula I need. I'm trying to develop a spreadsheet for book orders. I have a list of courses and accompanying textbooks for which I need quantities for major courses all students attend together, and minor courses that they attend separately. I have a separate list of students and which major and minor courses they have chosen.

My quantity uses a countif formula to count how many copies of major and minor course textbooks I will need:

Major courses in Column F of the students list:

=COUNTIF($F$20:$F$42;"Computer Science")

Minor coursesin Column G of the students list:

=COUNTIF($G$20:$G$42;"Business")

then another one which adds up the quantity with an additional copy for the instructor and subtracts any copies we already have in stock:

To order (quantity + instructor copy - in stock):

=IF(I5+J5-K5<0;0;I5+J5-K5)

How do I edit the countif formula to result in 0 when an instructor decides they will use other materials instead of a set textbook? Or is there another formula which is better suited to what I need? Thank you in advance!

 

[djaida]

Nice to hear we were able to help, Thanks!
I just removed the workbooks (table) from my computer.

Thank you!