This feature is available only in Price list, Under Products, in main left menu.
First, select the prices to be updated and from Edit sign select Batch Edit
The set of changes that can be done when Batch Edit for prices are:
Set Supplier per prices
Set Create Automatic Order
Set One Time Charge
Set Price Per Person
Set Charge Nights (general setting in prices tab in Product Details)
Below the settings section, the prices for which the changes are applied are listed.