Simplify: Bulk Price Editor

I have been waiting for an app like this for 2 years!!! Normally if I want to flat rate a group of items for a sale in Shopify, I cannot. I can only take a percentage off or a dollar amount. This is the solution I have been looking for. I just used it for a Christmas in July sale where I only wanted to mark down holiday leggings to a flat rate of $7 - every singe one was changed in minutes! AMAZING!