(B) One of the importers applies the discretionary method and works in the field of manufacturing cans, and since he does not keep commercial books, the import data was obtained from the Customs Authority for the year 1441 AH, where his imports for this year amounted to 250,000 riyals, while sales through export data amounted to 300,000 riyals Required: Determine the amount of zakat due on the importer for the year 1441 AH