A Mathematical Shopping Spree! Congratulations! Over the past few months, you have been spending your evenings as a cell phone sales man. This month you have sold $4200 worth of cell phone products, and have earned 15% commission on your sales. Your check is on the way and it is the perfect timing because you need to get some new school clothes. You can spend as much or as little of your check on cloths, but there are a few rules: 1. You can not spend more money than you have. You have $_ _to spend on you shopping spree. Use the space provided bellow to calculate the amount of money you will have to spend on your shopping spree and fill in the above blank.