Perform trend analysis as a substantive test on only stores that have been open all year. The expectation is that each store sales is predicted by its prior year sales. Use an 8 percent change materiality threshold for each store. From this test, list which stores should be investigated further.

***Note: I will post the data in a comment since Chegg won't let me attach it for some reason. I plotted a line graph with the two years of sales figures together and added a trend line. However, I'm not sure how to get it set to the 8% to see which stores need further investigation. Any help would be greatly appreciated!