u/Grand-Command-990

I bought a pair of Adidas shoe for $38 I believe 4 days ago. I saw the same shoe listed for $7 cheaper in next costco coupon book that will start in 2nd week of May. Do I have to bring and return the shoe in store for refund? Or I can just ask them to scan my membership , look for the past shoe purchase and give me the $7 price difference refund, without bringing in the shoe to return? Does costco do price adjustment and if yes how does it work? Thanks