multiple choices

Jenkins Jewelers operates with a 30% Contribution margin.it jenkins's sales increase by 20,000 operating in come will increase by . select one. a. 6000 b. 20 ono . 14 d. lo ooo at 2400 units of activity, a company's total Cost was 3000 while at 2800 units the total cost was 3 So why is this Cost Considered to be a variable cost a the total cost is the same at both activity levels b The unit cost is the same at both a clivita lever d. The unit cost at each activity level valles inline with the total cost. d. the total cost does not vary at the two activity levels aries indirectly