How to display 0.00 or Blank in report format when the item do not have unit price?

Scenario 1:

How to set report format to show 0.00 when the unit price is blank?

Refer the below transaction_

1. Go to Task > Design > click on the field that you want to show 0.00

2. Click on the small arrow [>] 

3. Edit the Format String to {0:#,#0.00;;"0.00"} 

4. Save and Preview

Scenario 2:

How to display Unit Price column as blank in Report Format for item that do not have Unit Price?

For below transaction:

1. Repeat Step 1 - 2 above

2. Edit the Format String to {0:#,#0.00;;""} > Save

3. Preview the new report format

Thank you :)