If you're looking to make around $10,000 more than Iowa's average wage, you might want to take a look at Costco. According to the Corridor Business Journal, KWQC-TV6 reports that full-time cashiers at the Costco Wholesale store planned in Davenport can expect to earn $54,000 within five years of employment with the company. This breaks down from a top-of-scale wage of $24.85, equaling $51,688 annually, according to a Costco representative. Top that off with a $5,000 yearly bonus added after a minimum of 1,000 hours after being at top rate. The total salary compares with retail salespersons' median wage of $10.46 per hour and the average annual salary of $43,540 across all industries in Iowa, according to the Bureau of Labor Statistics. The Davenport location would be Costco's third warehouse store in Iowa, including stores in Coralville and West Des Moines.