Anna sells a certain pair of earrings at her store for \\( \\$ 47.60 \\) per pair. Her overhead expenses are \\( \\$ 6.00 \\) per pair and she makes \45.00 operating profit on selling price. a. What is her amount of markup per pair of earrings? Round to the nearest cent b. How much does it cost her to purchase each pair of earrings? Round to the nearest cent