You can go for group shopping or become a member and the price will be very cheap.
Maybe this movie theater is pursuing a marketing strategy of high prices for ordinary customers and low prices for members.
Nowadays, most movie theaters do this to attract members.
This is because members have to charge money into their membership cards. If they don’t use it up once, they will come back next time. Ordinary customers may not come again after this visit, so the price is higher if you buy one.