Some shutter frames require you to increase the measurements by a number of millimetres to come up with the correct price.
E.g. if the measurements for the shutter are 2000mm by 2000mm, to get the correct price for the frame you must add 20mm and base the price on new measurements of 2020mm by 2020mm.
To accommodate this within Once, in V3 we have added a new Extras pricing method - inc width & drop
The number you enter in the cost a column in Once Setup should be the amount in mm you need to increase the measurements by.
The screenshot below shows how you would set up a Frame surcharge that was priced by adding 20mm to width and drop
