PR 6-6A Contribution margin analysis Obj. 5 1. Sales quantity Farr Industries Inc. manufactures only one product. For the year ended December 31, factor, $(2,200,000 contribution margin increased by $560,000 from the planned level of $5,200,000. The presi- dent of Farr Industries Inc. has expressed concern about such a small increase in contribution margin and has requested a follow-up report. EXCEL TEMPLATE