Customer demand can hardly be default because there are too many variables that affect purchasing behavior as income changes, habits do not like long term use of a product, the relative impact and time spent to get to location is important to them, not to mention replicas poor quality counterfeit, weave and reach consumers. In parallel it due to the product through the distribution intermediaries increase costs, as should imports a higher product price product makes consumers more sensitive in the choice and the ability to search to the products of other airlines higher.
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