Finding the cost function when fixed cost is $100 and 50 items cost $1600 to produce

This page describes the cost function

The Cost Function

Quite honestly, I've never heard of it before.

Perito, nice link. But perhaps this is a case of unfortunate wording of a much simpler problem.

If the total cost to produce 50 items is $1600, and the fixed cost is $100, then it must have cost $30 each to produce the items. (i.e. solve 50x+100=1600). It is then very easy to write a function for the cost of producing n items:

C = 30n + 100

Could it be that simple?

Josh