How to understand the difference of operating income under variable costing and absorption costing in terms of using different capacity levels and different variance recording approaches--Ajusted allocation-rate approach,Propation approach and write-off variance to cost of goods sold approach?
Under different capacity levels,inventories发生变化,Variable Costing 和 Absorption Costing的fixed manufacturing costs of current period是不一样的,进而当期的cost of good sold会产生不同,也就影响到最终的operating income。