The Rear Cushion is made up of components including this Cushion Assy,rear which is the most expensive.
Some items from this specific schematic: Bolt,soc 10x57, Bearing,needle (k, Label,rr Damper, Bolt,socket 10x70.
The component with the lowest price in the REAR CUSHION schematic is the Nut,u,flange,10mm.