Getting the average in a comment box after typing the last value

Hi: How can I automatically get the average on the cell´s comment box  each time I type a value?


Thanks!
philosopher76Asked:
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Roy CoxGroup Finance ManagerCommented:
Average of what? Attach an example workbook
philosopher76Author Commented:
Monthly sales average. Here is the file.

Thanks!
Sales.xlsm
Roy CoxGroup Finance ManagerCommented:
Is this what you mean?
Copy-of-Sales.xlsm

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philosopher76Author Commented:
The solution is perfect.
Roy CoxGroup Finance ManagerCommented:
Glad it helped
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Microsoft Excel

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