To calculate the weighted mean, we will weigh each price by the quantity consumed. This means we'll multiply each item's price per kilogram by its quantity consumed to find the total cost for each item. Then, we'll sum these costs and divide by the total quantity consumed to find the weighted mean price per kilogram.
Here are the steps to calculate the weighted mean:
Calculate the total cost for each food item by multiplying the quantity consumed by the price per kg:
Flour: 500 × 1.50 = 750
Ghee: 200 × 25.00 = 5000
Sugar: 30 × 4.50 = 135
Potato: 15 × 0.50 = 7.5
Oil: 40 × 5.50 = 220
Sum up all the total costs calculated: 750 + 5000 + 135 + 7.5 + 220 = 6112.5
Find the total quantity consumed: 500 + 200 + 30 + 15 + 40 = 785
Calculate the weighted mean by dividing the total cost by the total quantity consumed: Weighted Mean = 785 6112.5 ≈ 7.79
Therefore, the weighted mean price per kilogram, considering the quantities consumed, is approximately $7.79.