Does anybody know how to put items back to their original price when they are in markdown manager?

I have accidentally put all my items (305) on sale via Mark Down Manager.  Does anybody know how to return the listings to their original price.  I asked eBay, but of course, they said you have to do them individually, but I believe there is some way to do them all at once.  Would greatly appreciate any help.

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Ive just had a look at mine, and it says that active sales cannot be deleted, but there is also an edit button to the right, have you tried that? Failing that, try a bulk edit, but you may have to ride the sale out.