How does a firm calculate marginal cost?(1 point) Responses By dividing the change in output by the change in total cost. By dividing the change in output by the change in total cost. By dividing the change in total cost by the change in output. By dividing the change in total cost by the change in output. By adding up its variable costs and fixed costs. By adding up its variable costs and fixed costs. By subtracting it total cost from total revenue.

Answer 1

The correct answer is: By dividing the change in total cost by the change in output.