A sale involving both goods and services is known as a mixed sale

Costs that differ directly with the level of production are known as ________ costs

A) fixed B) overhead C) opportunity D) target E) variable

A software program that runs independently, consuming the resources of its host in order to maintain itself, that is capable of propagating a complete working version of itself onto another machine best describes

A) splog. B) tidal wave. C) Trojan horse. D) worm.