Diane, age 14, wants to purchase "Run Fast, Jump High" sneakers for $100. Her parents tell her she must look for a summer job and save her money for her sneakers. She decides to baby-sit for some neighbors. She charges $5 dollars per hour and usually has 12 hours of work per week. She's decided to save half of what she earns and spend the rest on movies, clothes, etc. Will she have enough at the end of five weeks to buy her sneakers? Why or why not?