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Excel/excel addition and subtraction using barcode scanner

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Question
the bar code scanner i have inputs like a keyboard wedge. once i scan into excel it does A1 grey tshirt then A2 grey tshirt and so on and so forth. i need a way to add these quantities up, or subtract, and change the quantity column for each item on the same excel sheet or maybe even a different one. i would like to do this via vba code and using excels bar code macro function. is there any possible way? and if so, could you help me out with the vba code?

Answer
bobby,

again, you don't need any vba code for what you describe..  You can use formulas.  For entries in column A


=countif(A:A,"grey tshirt")-countif(A:A,"grey tshirt 1")


so you are reading in a separate barcode to indicate subtraction.

if you wanted to do it from another sheet, assume the sheet with the entries is named Sheet1, then on another sheet you could do:

=countif(Sheet1!A:A,"grey tshirt")-countif(Sheet1!A:A,"grey tshirt 1")

--
Regards,
Tom Ogilvy

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Tom Ogilvy

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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.

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Master of Science (MS) degree Operations Research (ORSA)

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Microsoft MVP in Excel.

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