http://janabouc.wordpress.com/2010/11/11/sketching-at-rei-recreation-equipment-inc/

Every year Mary goes skiing with her family. This year, Mary did chores around the house and saved up all of her money so that she could buy herself new ski equipment. She saved a total of 1,200 dollars. She had already bought a pair of skiis for 450 dollars. One day after school, she went to the store with her friend Ken to buy new ski boots. She allotted 350 dollars from her total savings for this purchase.