Set shutter price from shutter design in SKU properties
Price a shutter by setting its rate from the shutter design in the SKU properties, and split differently priced variants into separate SKUs.
To price a shutter, open the SKU properties and set the price from the shutter design (e.g. a square-price rate).
If two variants have different prices, create them as separate SKUs so each carries its own rate and flows into the BOQ.