Davis Company curenty buys a component part for $640 per-unit. Days estimates that maknig the part would require $4.90 per unit of direct riatertals and $240 $1.90 per unit to make the part. The net incremental cost or savings of makirig the componerit is Mincle Choice 52. 40 cost per unt 5380 unvige per urit. $120 tout ther unt