This was a fun story with an amusing twist at the end. I like the fact that Sandra ended up being Ted's mother, and that she seemed as amused as anything by his attempts to sow chaos in the world. Nice work!

In the first paragraph, there's a bit of a contradiction between the sentence that say Sandra "hoped that if she ignored Ted long enough he would go away," and the sentence immediately after which said that Sandra "knew there was no way she could be that lucky." If Ted had "never been the type to go away" it doesn't make a lot of sense that her just hoping Ted would go away would be effective, if all evidence points to the contrary.

Ted's scheme was a bit confusing to me, in how it would be executed. Almost every place that offers employee discounts processes the discount as part of the transaction, so I'm not sure how Sandra would be able to "keep the leftovers" with a customer because the transition would be rung up at the employee's discounted rate. Maybe I'm just not thinking of the way this would work, but it would benefit the story to have a clearer sense of how the plot would work since it seems impossible to have a paying customer pay an amount different from what they're actually paying.

Overall, I thought this was a fun, amusing story featuring a couple of entertaining characters that kept my interest throughout. Nice work!