1. Gladys bought brands of shoes from a department store. She paid an average of Php 3000.00 per pair of shoes. The receipt is shown below where part of it is missing. Subtotal Quantity 3 2 2 Official Receipt Item Unit Price Nike Jordan 5000 Under Armour 2000 Adidas N a. How much did she pay for each addidas shoes? b. How much did she pay in all? How did you determine this?​