On the web version, you may update the products prices list in a large way from a CSV file format.

On the menu option Database > Products > Price List Update

On the pop-up window click on Download, keep in mind that on the CSV file you may change only the price columns and do not use commas

You also have the option to update the list based on the cost of the item and the percentage that you enter in the price column A, B, C, D, or E

In the CSV file enter the percentage value in the column corresponding to Price A, B, C, D, or E

You also have the option to alcize the list based on the cost of the item and the percentage that you enter in the price column A, B, C, D, or E

In the CSV file enter the percentage value in the column corresponding to Price A, B, C, D, or E

Once the file is saved, go back to the initial screen click on Upload.

Remarks: The devices iPad or iPhone should synchronize to update the change.  it is very important that when saving the file must be CSV (delimited by commas) and verify that they are commas and not another character. You can do it by right clicking on the file that you have saved and then open with Notepad