Statistics- what groups differed and the 95% confidence interval

Need to do a 1 way anova for statistics marketing class . Looking at 3 different display locations in a store: on the shelf, aisle end cap, at entrance. Five stores in different areas where looked at. Each store will use each location for a period of 4 weeks and sales results for the quarter will be looked at to see which display had most sales. Need to determine the variables: independent and dependent; what hypothoses; was data significant; what groups differed and the 95% confidence interval, and interpretation of results.