Average cost

I’m going on a five-day high school trip to Disney World in about a month, the school is paying for housing and some of the food. I’m wondering how much I should save or try to make, based on how much people usually spend. I’ve never been to Disney before so I’m not sure how much money I’d need in order not to have to worry about money too much and buy souvenirs and things. We’re going to Magic Kingdom, EPCOT, Animal Kingdom, and Hollywood Studios. How much do you usually spend?