• Find the output level at which the fixed cost would start undergoing a change.
• Determine the interval you would like to evaluate in our calculation of marginal cost.
• Subtract the number of items in the first run of your production from the number of items in the second run of your production.
• Determine the total cost of producing the items. The total cost of production is the sum of the total fixed cost and the total variable cost. The fixed cost includes the cost of capital expenditure, which does not change over time while the variable cost changes with respect to time.
• Determine the average cost per item. The average cost is the total cost of production divided by the quantity of items produced.
• Calculate the change in cost by taking away the old cost rim the new cost.
• Divide the change in cost gotten from the step above by the change in quantity.