7. The following data are for Apparel Company: North South Sales volume (units): Blouses Skirts 6,000 5,000 5,000 9,000 Sales price per unit: Blouses Skirts $22.00 20.00 $24.00 $22.00 Variable cost per unit Blouses 7.00 5 7.00 9.00 9.00$11.00 Skirts Required: a. Determine the contribution margin for Blouses. b. Determine the contribution margin for Skirts. c. Determine the contribution margin for the North Region. d. Determine the contribution margin for the South Region