If you sign a contract with the store owner, it is clearly stated in the contract that you can't refund the deposit before the contract time, then you really can't get the deposit. Then you have to decide for yourself whether you don't need a deposit or give it to 2400 a week. Or do you calculate again, if you continue to do these two windows until the winter and summer vacations or the contract expires, will the loss in one week be more than 2400?