You can get an idea by going to this link https://www.universalorlando.com/web/en/us/tickets-packages/park-tickets
Depends on what kind of ticket you buy. Express is little bit more expensive but is worth when park is crowded. Check prices on official website. I went two months ago or so and it was approximately 180 dollars with express pass which was GREAT to have.
$109 to $129 (dependant on date) for an adult Universal Studios day ticket paid online in advance
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