I would like to change the % of markup from what I used when setting up my business.  I can't find anywhere that instructs me on how to change that % of markup on all my inventory items?  I would like to keep my cost and change the % of markup that will do all of them at once keeping the cost and recalculating the sales price on all of my numerous inventory items.  I'm using QuickBooks Pro 2020.  Can anyone help with that?