The shopping spree may start months, weeks or maybe the day before the school year begins. Buying a dozen pencils and a few Trapper Keepers won't cut it for today's students. The back-to-school buying binge may include trendy new clothes, shoes, sneakers, in addition to hefty expenses for extracurricular activities. For older kids, a new laptop, tablet or mobile phone may now be essential. It all adds up fast! According to a recent survey by RetailMeNot and The Omnibus Company, parents spend nearly $660 a year on school-related costs for their family.