4 people, and 35$ per person. You spend 140 total on tickets alone. +15 for parking adds up to 155. Subtract all of that from 200, and you have 5 bucks left to spend.
Since she drank 4.5 mm of slushy per second, she continued to drink for 17 seconds so 4.5•17=76.5 Now that you have how much she drank, add that to how much is remaining (148.5) and the original amount that she drank; the answer is 225 milliliter of slushy