Manufacturing costs for product X include direct materials $18 per unit, direct labor $4 per unit, variable overhead $2 per unit, and fixed overhead $3 per unit, for a total of $27 per unit. If production volume is increased by 10 units, how much will total manufacturing costs change in the short term? Assume that the new production volume is in the relevant range. (hint: the total cost equation might be useful here) increase by $220 not enough information -- need to know the original volume increase by $270 increase by $240 increase by $250