The operating income calculated under the variable cost method in scenarios with a constant marginal contribution ratio varies from period to period: to.

a. because of unidentified changes.

b. due to changes in sales level.

c. because of changes in production level.

d. due to changes in the level of sales and production.

Part II.

The denominator level selected that would usually result in the application of the lowest fixed cost is: Select one: a.theoretical level b.master budget level c.practical level d.ordinary level