Bulk Price Update
To perform an update of all prices across a range of Products or Services:
Simply click on the Settings menu as shown below:
Then, under Products and Services, Click on Bulk Price Update
This will take you to the Price Change screen, where you will be required to filter the products/services you want to change and then input the amount you will be increasing those products/services.
NB: Before clicking on Start Update it is important that you make sure you are happy with the new prices displayed at the bottom of the screen