'The popcorn comes at a cost', 'The popcorn isn't free', 'The popcorn cost $10', 'You must pay for the popcorn' or, simply just, 'The popcorn is not free'. The statement, 'You will take your infant about the flight free of cost' can be in opposition to 'It's important to pay out to get your infant with a plane' or 'It's not free', or informally, 'Y