'The popcorn comes at a cost', 'The popcorn is not free', 'The popcorn Value $10', 'You must pay for the popcorn' or, merely, 'The popcorn is just not free'. The assertion, 'You usually takes your newborn within the flight free of charge' would be in opposition to 'You have to pay back to take your toddler on a aircraft' or 'It isn't free', or info