[Resolved]  Amazon Mktplace Pmts — charge on credit card

I am trying to find out about a charge on my credit card statement for $76.90 dated 5/10/2011
Since I do not remember purchasing anything from Amazon, and cannot find anything in my records I would like a description of what the item is.
The description I received from my credit card company just said "merchandise". I need to know exactly
what it was.
Please respond.
Margaret Wahlborg