To attach a workbook, use 'Go Advanced', then click on 'Manage Attachments' and follow the cues to select your document and attach it to your post.
VBA (aka Macros) will let you encode procedures that normal Excel doesn't do on its own. Some offices/individuals don't like VBA solutions because malicious procedures can be written, but if it's for home use and you're comfortable with the code and/or you trust the source, it shouldn't be an issue. What you're requesting is a straightforward 'Change' event where we'll tell Excel to clear B4:B100 every time B2 is changed. If you can attach your workbook, I can put it in for you. Otherwise, I can try to walk you through how to install it yourself. In general, the latter option is safer, since it lets you view the code to determine that it's not malicious before adding it. For complicated procedures, it may be hard to tell what is/isn't malicious. The procedure we're adding for you, though, is pretty short and to the point; it looks like this:
Try uploading your workbook again, and let me know how you want to proceed with the VBA procedure.
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