Good bye, Mom ...

It looks like a sad story...but do continue reading to theend!.....It?s a lesson to learn..................
I was walking through the supermarket to pick up a few things when Inoticed an old lady following me around. Thinking nothing of it, Iignored her and continued on. Finally I went to the checkout line, butshe got in front of me.
"Pardon me," she said, "I'm sorry if my staring at you has made you feeluncomfortable. It's just that you look like my son, who just diedrecently."
"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 wouldmake 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.