In the Rates/Prices tab of the Damage Waiver item setup, click the :: popup menu button to the left of the Each unit.
Select the Percentage Calculation menu option.
This will open the Charge % Calculation page.
Enter a Charge %, e.g. 12
Select whether the charge will be based on the end discounted price or whether it will be based on the normal retail price.
Select whether the percentage is to be calculated on the Exclusive or Inclusive amount.
Select which items the percentage is calculated on.
There are a few scenarios to consider, with further setup steps required based on which method you choose.
- (most common) Calculate based on the value of the hire item lines only.
  Choose the % of all Hire items option.
  Damage Waiver item will be added once only as the last item on the Contract.
- (most flexible) Calculate based on certain hire items only.
  Choose the % of previous line item option.
  Damage Waiver item will need to be added as a companion to each of the Items it applies to, and each of those item lines on the Sales Record will have a Damage Waiver item below them.
- (uncommon) Calculate based on all the overall value of the contract.
  Choose the % of ALL items option.
  Damage Waiver item will be added once only on the sales record.
Select whether the calculated amount is to be inserted into the Sell Inc or Sell Ex. The relevant tax is calculated accordingly.
Click Save Changes.

Damage Waiver Item (Percentage Calculation)

Damage Waiver Items (% calculation)