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4. Sales of Products: Schedule of sales of products by metal (Details) - USD ($)
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Details    
Gold sales $ 1,716,616 $ 1,520,699
Silver sales 5,080 3,896
Smelter and refining charges (135,069) (123,761)
Total $ 1,586,627 $ 1,400,834