Fourteen-year-old Emily was thrilled. After six months of intense lobbying, she finally convinced her parents to buy her a cell phone. Emily’s parents gave her a cell phone with the stipulation that she could use only 500 minutes per month. They warned her not to go over her minutes and showed her how to check her remaining minutes at any time. Emily wholeheartedly agreed and promised not to go over her minutes; after all, 500 minutes seemed like a lot of time. At the end of the first month, Emily’s parents were shocked to discover that Emily’s cell phone bill was more than $1,200. They were furious with Emily and took away her cell phone. She would pay her parents back over the next year doing extra chores around the house.
