Base 4 Drawer w/ Split Top Drawers Equal Height Bottom Drawers

Base cabinet, with 4 drawers. Bottom 2 drawers are equal height (9.75in. H openings on standard 34.5in. H cabinet). Top 2 drawers are equal width. (Note: when height is changed from standard 34.5in. H, only the lower openings height changes. Upper drawer openings remain fixed at 5in. H).