DQuestion 20 4 pts Alberver, Inc. manufactures jumbers that sell for $40.Each jumber uses $15 in direct materials and $5 in direct labor per unit. Alberver machine hour, and Finishing, which is applied at the rate of $20 per batch. This month, Alberver made 400 jumbers, using 1,000 machine hours in 40 batches. What is the gross proft for one jumber? has two activities: Machining, which is applied at the rate of $2 per $20 $13 $27 $30 4 pts D Question 21 A cost driver O is the same as a fixed cost. is an activity that causes total costs to change. O is a method of calculating mixed costs. is the same as margin of safety