Grade of Gold log normal Metallurgical recovery Triangle Production Triangle Costs Triangle Analysis of Au and Ag prices For the analysis of Au and Ag prices, monthly prices have been considered since 2025 (https://es.investing.com/commodities/silver-historical-data). Table 2 – Au and Ag Prices. Table 3 – Gold Statistics. Table 4 – Silver Statistics Figure 2 – Price behavior of Au and Ag Analysis of metallurgical recovery After reviewing historical information, it was determined that the metallurgical recovery of Au follows a triangular distribution. Date US $/Oz Au US $/Oz Ag Ene-25 2,845.20 32.49 Feb-25 2,895.90 32.11 Mar-25 3,150.30 34.61 Abr-25 3,319.10 32.83 May-25 3,343.90 33.42 Jun-25 3,307.70 36.17 Jul-25 3,348.60 36.71 Ago-25 3,512.00 40.66 Set-25 3,873.20 46.64 Oct-25 4,015.90 48.62 Nov-25 4,202.30 53.61 Dic-25 4,386.30 77.92 Au 2025 Ag 2025 Mean 3,516.70 Mean 42.15 Stardar error 143.39 Stardar error 3.85 Median 3,346.25 Median 36.44 Mode #N/D Mode #N/D Standard deviation 496.71 Standard deviation 13.33 Sample variance 246,724.05 Sample variance 177.65 Kurtosis -0.81 Kurtosis 4.42 Skewness 0.47 Skewness 2.00 Range 1,541.10 Range 45.81 Minimum 2,845.20 Minimum 32.11 Maximum 4,386.30 Maximum 77.92 Sum 42,200.40 Sum 505.79 Count 12.00 Count 12.00 Correlation Coef. 0.88964979
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