Gold is a precious metal that often used as standard medium of exchange in the finances various countries and trade. does not face devaluation price. Gold, metal, currency commerce throughout country. The purpose this study was to find out how JCI, inflation, SBI interest rates, gold demand had an effect on price Indonesia during Covid 19 pandemic. Least Square Regression Analysis technique com...

Metal price is one of the most important parameters in the calculation of cut- off grade. The cut- off grade has the main role in determination of mine layout. Mine layout actuates mineable reserve, mine life and economic profitability. Not considering the uncertainty in metal prices can lead to a non-optimal layout. In this paper optimum underground mine layout is determined by expected utilit...