4. Sarah earns $13.50 per hour. Over the course of four weeks, she worked 32 hours in the first week, 18 hours the second week, 36 hours the third week, and 24 hours the fourth week. If she spends all her money on tickets to see her favorite sports team, which cost $125.00 each and an additional service fee of $12.50 per ticket, how many tickets will she be able to purchase?