(1) The warehouse inventory balance at December 31, 2021 is net of a write down to net realizable value of $539 (December 31, 2020 - $Nil) at the Guanacevi and $357 (December 31, 2020 - $Nil) at the Bolañitos mine.

(2) The stockpile inventory balance at December 31, 2021 is net of a write down to net realizable value of $Nil- (December 31, 2020 - $254) for stockpile inventory held at the El Compas mine.

(3) The finished goods inventory balance at December 31, 2021 is net of a write down to net realizable value of $nil- (December 31, 2020 - $151) for finished goods inventory held at the El Compas mine.