Excel/excel inventory

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Question
"so i have a formula, =COUNTIF(A:A,"grey")-COUNTIF(A:A,"grey-1") that will give me a number of the amount of tshirts that i have sold, or added, to my inventory. if i only sell shirts, i will have some negative number, if i got new ones in, i will have a positive number. it just counts the total number of shirts coming and going out for the day, lets say that number is in A1 and the number for today is -3, reflecting that i have sold 3 shirts. well i have the number of shirts i started with that morning, lets say 10, in column B1. i need for B1 to update its value by getting the sum from A1 and itself. is there a way to do that? now i can use a copy of my original spreadsheet to configure the new totals and all of that, but i need the master sheet to be updated using the numbers from the copy. i only sell 12 different tshirts with different sizes but i sell alot, as well as acquire new inventory, so i like to use this method because it allows me to use my barcode scanner. is!
 there any way to get the cells to update their numbers from another sheet without the "=" operator? the = operator will not work because i wouldnt have a number to reference for calculations. help please."

Answer
bobby,

I showed you how to add in your onhand inventory.

At this point, if you want to send me your workbook, which I assume has a working sheet where you put in your barcode data each data and a master sheet where you want to accumulate your inventory.  If I understand what you are describing, I can offer an approach.  There is no need to keep piling up questions even before I have had a chance to answer them.  

You can send your workbook to twogilvy@msn.com

It doesn't have to have your actual data if that is a concern but then I will only be able to answer with respect to what you send me.

Don't expect an instant response.  I answer questions in my spare time.  

--
Regards,
Tom Ogilvy  
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Tom Ogilvy

Expertise

Selected as an Excel MVP by Microsoft since 1999. Answering Excel questions in Allexperts since its inception in 2001. Able to answer questions on almost all aspects of Excel's internal capabilities. If seeking a VBA solution, please specify that in your question itself so I give you the answer you want. [Excel has weak protection - if you are distributing an application, I don't answer questions on how to protect your project from your users.]

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Extensive experience.

Education/Credentials
Master of Science (MS) degree Operations Research (ORSA)

Awards and Honors
Microsoft MVP in Excel.

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