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9. CONVERTIBLE DEBT (Details Narrative) - USD ($) | 3 Months Ended
--- | ---
Mar. 31, 2020 | Mar. 31, 2019
Interest expense | $ 40,689 | $ 50,000
Expected dividend yield | 0.00% |
Remaining term (years) | 3 years |
Amortization expense | $ 0 | $ 17,534
Minimum |  |
Expected volatility | 104.06% |
Risk-free rate | 1.49% |
Maximum |  |
Expected volatility | 111.54% |
Risk-free rate | 1.59% |

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