This search engine cannot determine rate of duty base on specific duty rate.
Specific Duty: Specific Duty is based on units of measurements, such
as quantity (e.g. $5 per dozen; $25.00 per litre) or weight, either net weight or
gross weight (e.g. $20 per kilogram net)
Classification where this issue will arise: 1701999, 2208 and 2402