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4. Sales of Products: Sales of products by metal (Details) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Details        
Gold sales $ 2,296,378 $ 1,461,249 $ 4,010,102 $ 2,980,560
Silver sales 9,103 2,905 13,424 5,946
Smelter and refining charges (125,249) (139,656) (256,667) (261,175)
Total $ 2,180,232 $ 1,324,498 $ 3,766,859 $ 2,725,331