A manufacturer of lighting fixtures has daily production costs of C = 800 - 10x + 0.25x^2. where C is the total cost (in dollars) and X is the number of units produced.

How many fixtures should be produced each day to yield a minimum cost?

A manufacturer of lighting fixtures has daily production costs of C = 800 - 10x + 0.25x^2. where C is the total cost (in dollars) and X is the number of units produced.

How many fixtures should be produced each day to yield a minimum cost?