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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, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Details        
Gold sales $ 1,979,595 $ 1,122,291 $ 4,870,402 $ 2,891,607
Silver sales 6,899 2,346 14,556 7,233
Smelter and refining charges (133,858) (91,792) (339,994) (275,048)
Total $ 1,852,636 $ 1,032,845 $ 4,544,964 $ 2,623,792