The Screw, Pan Head (7h3) is the cheapest item from this partsfiche.
Some items from this specific schematic: P1n, Dowel, Screw Pan Head, Gasket, Crank Case Cover (l.h) (mca), Gasket, Crank Case Cover (r.h) (mca).
The most expensive part in this assembly is the Cover,crank Case(l.h)2.