What does economies of scale mean? It is cheaper to make fewer units because of fixed cost behavior. It is cheaper to make fewer units because of variable cost behavior. It is cheaper to make more units because of variable cost behavior It is cheaper to make more units because of fixed cost behavior. In the cost function of y = $18,000 = + $9x, what does the $9 represent mathematically and for cost accounting? The slope and cost object The slope and cost driver The slope and variable cost per unit The slope and fixed costs In the above question, what would the unit cost be if units sold are 6,000? $9 per unit $12 per unit $72,000 $12,000