Some items from this specific schematic: Ybs67-8 Washer, Spring, Ybs67-8 Washer, Spring, Bolt (j40), Bolt, Hexagon (676).
The sub assemblies and components that make up this Upper Casing include this Casing, Upper, the most expensive part.
The Ybs67-8 Washer, Spring is the lowest priced item on this Upper Casing schematic.