Is it permissible to take 50 US dollars from each fasting person to cover the budget deficit, given that a merchant has already covered all the expenses for the iftar (breaking of the fast) for those fasting at the center?

"It is not permissible to impose charges on fasting individuals who break their fast at your center, because it might deter those in need and attract those who are not. The solution is to deduct a portion of the iftar expenses, which the merchant donated, in consultation with him, in exchange for preparing the food, place, and services. This is because his donation includes what is necessary for the iftar, including preparation and readiness."