Instead of setting or changing your item prices one by one, you can set prices of all items by going to the Inventory module and clicking on "Set Item Prices".
This screen will display all the items that you indicated as "I Sell this item" and allows you to enter your revised selling price for each.
You can also select to do a price revision for all or selected products as a percentage margin or markup of cost by clicking on the "Shortcuts" button at the bottom left of the window.
