The quality of the casting determines its actual cost: the higher the quality of the casting, the less its real cost. 

The actual cost of an equipment does not coincide with its purchase price alone, but also depends on its life span and on set up costs.

Actual Cost= C-purchase + (N-set up x C-tooling) / duration 

A good quality casting has a longer life span and therefore reduces the number of set ups required to replace worn-out parts.