How to compare and get results from two columns with varying data?

[t4nks]

Can't afford to waste time so I hope you don't mind if I delve straight into the problem. My sister has somehow managed to mess up a spreadsheet she was working on for work.
There are 3 columns,

customersA ,, locationA ,, otherA

somehow her LOCATION is wrong for the corresponding CUSTOMER and if the location is wrong so is the data in the OTHER column.

she does luckily have a correct spreadsheet which we shall call b

customerB ,, locationB,, otherB

but there are some extra customers,,


therefore the issue is when I use a simple
=if (customerA = Customer B, location A = Location B, False)

the fact there are extra customers messes up the formula when I drag it down, as e.g.
CUSTOMER A
Alex
Bruce
Chris
dave
Edwards

CUSTOMER B
alex
amy
Bruce
Chris
dave
Edwards

so if I drag it down the extra customer Amy offsets the whole formula.

and just to add to the problems some of the customers have the same names and I can't change the duplicates to Amy1 amy2 as the customer list is 7000 customers long.

Please guys any suggestions are very much welcome!
My sister is in major help and stressed and i'm out of ideas.
We have been going through manually and has taken us 3 1/2 hours to do 690 of 7000 customers...

[alansidman]

Your post does not comply with Rule 1 of our Forum RULES. Your post title should accurately and concisely describe your problem, not your anticipated solution.

Use terms appropriate to a Google search. Poor thread titles, like Please Help, Urgent, Need Help, Formula Problem, Code Problem, and Need Advice will be addressed according to the OP's experience in the forum: If you have less than 10 posts, expect (and respond to) a request to change your thread title. If you have 10 or more posts, expect your post to be locked, so you can start a new thread with an appropriate title.

To change a Title on your post, click EDIT then Go Advanced and change your title, if 2 days have passed ask a moderator to do it for you.

(This thread should receive no further responses until this moderation request is fulfilled, as per Forum Rule 7)

[t4nks]

Hi Alan,
extremely sorry,
could you tell me how I can change the thread title can't seem to Fi d the option, I am using my phone so it's a little difficult.
many thanks,
Tank

[alansidman]

Click on Edit Post and then make change in Title section.