Supermarket Encounter

I was walking through the supermarket to pick
up a few things when I noticed an old lady
following me around.
Thinking nothing of it, I ignored her and
continued on. Finally I went to the checkout
line, but she got in front of me.
“Pardon me,” she said, “I’m sorry if my staring
at you has made you feel uncomfortable. It’s
just that you look like my son, who just died
recently.”
“I’m very sorry ,” I said to her, “Is there
anything I can do for you?”
“Yes,” she said, “As I’m leaving, can you say
‘Good bye, Mom?’ It would make me feel so
much better.”
“Sure,” I said. An odd request, but no harm
would come of it.
As the old woman was leaving, I called out,
“Good Bye, Mom!”
As I stepped up to the checkout counter, I saw
that my total was $1027.50.
“How can that be?” I asked, “I only purchased
a few things!”
“Your mother said that you would pay for her,”
said the clerk. :p