we have run many of these this summer. Often they are for particular areas, such as thread and notions wall, papercrafting, paints etc. Also, many of the 20% or 25% off total purchases have been for both sale and regular items. You just can't use a coupon on a coupon (ex. if you use a 40% one item, this item will be excluded from the 25% off total purchase). But, you do need to read the coupon because some of them are in-store only or online only. One hint is that if there isn't a barcode on the coupon, it will be online only. Also, the system will not process an expired coupon, it simply will not do it, so please check the dates.