Hello, hope all is well during this time. Having difficulties understanding this concept.

10. Ray's Fine Leathers always maintains a line of except of exceptionally high quality wallets. However, the latest shipment of 12 new wallets that recently arrived adding to the 8 that were already in inventory were priced at $289 rather than the $249 price point of the existing stock. To keep the prices consistent, the buyer repriced the $249 wallets to $289. All sold at the $289 price point. What was the additional markup percent gained on the wallets already in inventory