Find the mean of the following set of data. round your answer to two decimal places. $12.50, $13.23, $11.20, $14.50, $12.50, $13.23, $15.60, $15.75

Barney & noblet customers can choose to purchase a membership for $25 per year members receive 10% off all store purchases 1. how much would a member pay per year if he bought $50 worth of items each year? 2. write a slope-intercept equation that expresses how much a member pays per year using x to represent his purchases per year 3. how much would a member have to spend per year to pay off his membership fee?