The first step in marginal analysis involves defining marginal cost as the change in total cost from producing a small amount of additional output.
Step 1: Define marginal cost as the change in total cost from producing a small amount of additional output.
Step 2: Identify the change in total cost or variable cost for producing one more unit of a product.
Step 3: Calculate the marginal cost by dividing the change in total cost by the change in quantity.
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