The markup can be edited for the site as a whole or for individual categories.
To edit the site as a whole:
Navigate to SYSTEM > CONFIGURATION.
In the left column under the GUNIMPORT tab you will see Gunimport Settings. From this screen you are able to control the multiplier for all the guns and accessories.
Price Multiplier: For Accessories
Gun Multiplier: For Firearms
If you'd like a markup of 20%, the multiplier should be set to 1.2 and so forth.
To edit individual categories:
Navigate to CATALOG > MANAGE CATEGORIES.
Select the desired category or subcategory.
On the Gunimport tab, there is a price multiplier section. Enter the price you want, again you’ll enter 1.2 for 20%. The other boxes can be left blank.
Once all changes are saved you will need to reindex the site.
SYSTEM > INDEX MANAGEMENT. Select All, Refresh.
**Please note it may take ~30 minutes or longer for prices to completely reindex depending on the number of products imported into your site.