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how to find weighted average method. Under this method simple average rate at cost is obtained by adding the rate of purchases represented by stock at the time of issue then dividing the same by the number of such rates. In this calculation the cost of goods available for sale is the sum of beginning inventory and net purchases.
A computer store has 10 laptop units at a 2000 cost basis 15 laptop units at a 1700 cost basis and 20 laptop units at a 1400 cost basis. The simple average would be 805 but there are twice as many units at 800 so the weighted average should be closer to 800 than it is to 810. Weighted Average is an average in which each observation in the data set is assigned or multiplied by weight before summing to a single average value.
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Add the results of step two together. Calculate your weighted average of your grade. How to Calculate Weighted Average in 3 Steps with Example 1. You simply write-out the formula of the weighted average.