Who is Amanda Fisher?

I'm starting a new project today (art, writing, investigative, all of the above?), retracing a few of my mother's steps during her final few weeks of life, as evidenced by receipts (and other pieces of ephemera) found in her wallet when she died on December 28, 1988, the wallet serving as a kind of time capsule from almost 28 years ago, having traveled over 5,600 miles (we lived on Rhein Main Air Base near Frankfurt, Germany at the time).

On December 8, 1988, she went to the post office. Looks like she mailed four packages, most likely back to "the States", probably to one or both sets of parents/grandparents and one or more of her four sisters. She spent $54.71.

So today, while I didn't have any packages to send (yet), I too went to the post office and spent $56.40  (as close as I could get to $54.71 in first class holiday stamps).

But who is Amanda Fisher?