Sophie does 4 loads of laundry a week and uses 1 dryer sheet per load.  A box of dryer sheets costs $5.50 and has 104 dryer sheets in a box.  On her birthday, she was given wool dryer balls to use instead of dryer sheets.  How much money does she save in a year not buying dryer sheets?
Please reason step by step, and put your final answer within \boxed{}.
user