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4. Sales of Products: Schedule of sales of products by metal (Details) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Details        
Gold sales $ 1,654,334 $ 1,979,595 $ 4,629,816 $ 4,870,402
Silver sales 2,593 6,899 6,881 14,556
Smelter and refining charges (100,857) (133,858) (355,296) (339,994)
Total $ 1,556,070 $ 1,852,636 $ 4,281,401 $ 4,544,964