 
 <prompt> Wetin be di costs wey airports dey find demsef need to regulate? Based on di previous question, write a context wey contain di answer. E fit be 1 - 20 sentences. Context: <response>: Most big airports dey get shops wey dey sell products and services. Plenty of these companies, wey many of dem na popular brands, dey inside the departure areas. Dem include boutiques wey dey sell clothes and restaurants. The prices wey dem dey sell these items dey usually higher pass the ones wey dey outside the airport. But some airports don dey regulate the costs to make am similar to "street prices". This term dey deceive as prices often dey match the manufacturers' suggested retail price (MSRP) but dem almost never dey sell am at discount. 