The Promotions & Price Bands report has two settings, Summary and Breakdown. After setting the start and finish dates & times you can select either of these options before pressing Load Report.

The summary report provides a line for each promotion listing the total charged for items under that offer, the original price and hence the discount provided, and finally the number of items affected and so the average discount.

The breakdown report shows the same information but adds a breakdown by sale item for each promotion. It also gives a total discount per promotion.