18. Determine (a) the maintained markup percent and (b) the gross margin percent for a department that has the following figures: (22 points) Net sales $475,000 Net purchases 210,000 Opening inventory 115,000 Freight inward 3,200 Closing inventory 95,000 Cash discounts 4,850 Alteration costs 2,150 19. Determine (a) the $ net markdown and (b) the net markdown % from the following