Help with being healthy in uni!

I'm a first-year university student and I live in residence. Because I started uni when I was still 17, my parents have been helping me pay for everything. They paid for my tuition, my rent, and gave me $400 for groceries (which is long gone by now). My school's residence building is different from most because each room actually has 2 seperate bedrooms, a kitchen, and a bathroom, rather than a room with two beds and then a communal kitchen and bathroom. Because we have our own kitchen, we have our own full-sized fridge. The problem I've been having is that whenever my roommate and I go grocery shopping, we spend tons of money We usually do have a list, too. I always try to buy healthy foods, and because I'm a Nutrition student I know what kinds of foods I should buy, but the thing is, they are so expensive. 5 oranges are $7.99. Tomatoes are $6.99 for 4. Carrots are $5.00 for a small bag. And the money adds up. Also, usually when I buy groceries, when we get back to our dorm and we're putting stuff away, it seems like we have so much, but when I want to cook something, we literally have nothing in our fridge! I've applied for a few jobs but I haven't heard back from any. I am expecting a cheque for $1300 from the government for doing well in high school next month, but I don't want to waste it. It's really tiring not being able to afford healthy foods and not ever having any food in our fridge.

ALSO, I have no way of working out! I've been a competitive cheerleader for 6 years, so I was always used to conditioning and working out often. But when I moved this year I wasn't able to join one of the local teams because 1. they are too expensive for me, and 2. their gym is too far away and would take about an hour by train to get there. I know people are thinking "what about your school's gym?" But my classes end every day at 12pm, so though I applied as a full-time student, my school doesn't consider me one. The gym as well as other recreational activities and facilities are only free to full-time students, and cost about $150/month for everyone else. I obviously don't have that, and I can't ask my parents to spend that much monthly for me when they've already spent and are still spending so much. I've tried working out in my room a few times (cardio) but there's not really much I can do that won't disturb the people on the floor below me. There's also very, very little space for me to do anything in my room. My last option is of course just going for runs outside. I hate running, to be honest. I didn't even like it when I was in cheer. Actually, even if I did like it, I wouldn't be able to do it anyway, since there's snow and slush and ice already (though I'm hoping it will melt..). Are there any options I'm missing? I'm really tired of not doing anything but it seems like there's nothing I can do.

Thank you