John is saving up money to buy a gaming console that costs $500. He currently has $200 saved. He earns $15 per hour working part-time and works 10 hours a week. Additionally, he makes an extra $5 for every hour he works over 10 hours per week. If John works 15 hours a week, how many weeks will it take for him to save enough money to buy the gaming console? Let's think step by step and output the final answer within \boxed{}.
user