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