Jasmine’s mother has instructed her that she must keep at least the amount of her initial deposit ($200) in the account at all times. Any purchases that she makes must not bring her balance below that amount. After a number of weeks, she has a balance of $225 dollars. She wants to make a purchase of an item that costs $75. Assuming her saving is consistent with the information given above, how many weeks will it be before she is able to purchase the item without dropping below the required $200 balance in her account? Write your answer in the box.