Consider the following mixed cost function, written in the standard "Y=a+bx" fo 100,000=25000+150(500) What is the total fixed cost and what is the variable cost per unit, in dollars? 100,000 total fixed cost and 25,000 variable cost per unit 25,000 total fixed cost and 150 variable cost per unit 150 total fixed cost and 500 variable cost per unit 500 total fixed cost and 100,000 variable cost per unit