If user needs to replace the purchase of all items to Zero then this can easily be done with the Marg Software: 

As the user can view (in below shown image) that all the items contains purchase rate: 

In order to replace purchase rate with zero, the user needs to follow the given steps: 

• Go to Reports > Management Report > Multi Editing > Item Master Multi Editing. 

• An 'Item Master Multi Editing' window will appear. 

Stock as on: The user will mention the date up to which the details of the items and select other options as per the requirement.

• Now the user will click on 'Accept'.

• The user can view all the items where the user needs to press 'Enter'.

• A 'Multi Editing' window will appear. 

• The user will click on 'All Items'.

• In 'Replace with' option the user will select 'Yes'.

• Now from the drop down the user will select 'Purchase Rate'.

• And from next drop down the user needs to select that rate which is already of zero value.

• Suppose select 'Rate-I'.

• Now the user will type "Sure".

Now the user can view that the purchase rate of the item will be replaced with zero.

Note:- Firstly the user needs to take a backup before use to this option.

1. Go to Reports > Management Report > Utilities > Structure/Junk Verification > Direct Command.

2. The Direct Command window appears in which the user will enter the password as a current date in a Reverse format(yy/mm/dd).

3. Press 'Enter' key.

4. A Command window appears. Enter command Select PRO press enter and type BROW. Click on Run.

5. PRO file will appear. The user has to press the 'ESC' key.

6. In the next window, the user will type REPLACE ALL PRATE WITH 0

7. Click on the Exit button.

After following above mentioned steps purchase rate of all items gets changed.