To get to your pricebook from the S2K main homepage - Click the PRICEBOOK section > PRICEBOOK MANAGEMENT bubble > Click theMANAGE PRICEBOOK link.
Your pricebook page will open. Where you can the use the search tools available to locate a group of the items you are needing to change retail for:
You can also use the ADVANCED SEARCH feature to help group the items:
Use the search window to filter your search further, then click OK:
You will then see the advanced search work with the main search to locate the group of items:
Once you've filed your search use your CONTROL key on your keyboard to select multiple items intended for a price change. Hold the control key and select through the list - you will see a black dot appear next to the selected item:
Click Batch Edit to edit the retail of selected items:
Change the retail price, make sure the change scope is for only the items you have selected, then click OK: