English-speaker, someone from a country that speaks english i.e. Britain, US; originating from term (Anglo) referring to early northern european peoples. He is an anglophone.
The Council On State Taxation (COST) is the premier state tax organization representing taxpayers. COST is a nonprofit trade association consisting of more than 600 multistate corporations engaged in interstate and international business. COST's objective is to preserve and promote equitable and nondiscriminatory state and local taxation of multijurisdictional business entities.
Average total cost, sometimes referred to as the per unit total cost, is the per unit cost. This includes fixed costs, those costs that are required for production but do not change based on output, and variable costs, those costs that increase (or decrease) as output increases (or decreases).