Step 1: Identify the prices for the base year (2005) and the current year (2010). Prices in 2005 ($P_0$): Commodity A: 12 Commodity B: 16 Commodity C: 10 Prices in 2010 ($P_n$): Commodity A: 20 Commodity B: 25 Commodity C: 12 Step 2: Calculate the sum of prices for the base year ($\sum P_0$). $$ \sum P_0 = 12 + 16 + 10 = 38 $$ Step 3: Calculate the sum of prices for the current year ($\sum P_n$). $$ \sum P_n = 20 + 25 + 12 = 57 $$ Step 4: Apply the formula for the Price Index Number using the simple aggregative method. The formula is: $$ \text{Price Index Number} = \frac{\sum P_n}{\sum P_0} \times 100 $$ Substitute the calculated sums into the formula: $$ \text{Price Index Number} = \frac{57}{38} \times 100 $$ $$ \text{Price Index Number} = 1.5 \times 100 $$ $$ \text{Price Index Number} = 150 $$ The Price Index Number using the simple aggregative method is $\boxed{\text{150}}$. Send me the next one 📸