A young woman was walking through a supermarket to pick up a few things when she noticed an old man following her around.Thinking nothing of it,she _ him and went on shopping.After she got what she wanted,she went to checkout line,but the old man got in front of her. "Pardon me!" he said,"I'm sorry if my staring at you has made you feel uncomfortable ,it's just because you look like my granddaughter,who just died recently.And I miss her very much." "I'm very sorry,"said the young woman."Is there anything I can do for you?" "Yes." the old man said."As I'm leaving,can you say 'Good-bye,grandpa' to me? It would make me feel so much better." "Sure,"answered the young woman. As the old man was leaving,she called out."Bye-bye,grandpa!" When she stepped  up to the checkout counter ,she saw that her total was $178.50. "How can that be?" she asked."I only bought a few things!" "Your grandpa said you would pay for him," said the clerk. Why did the old man follow the woman and let her say "Bye-bye,Grandpa"?
He wanted to steal her money. She looked like her dead granddaughter. He wanted to stare at her. He wanted her to pay for him.