Aiko, Ltd., had the following data (in millions of yen) for a There were no beginning or ending inventories. given period: Requirement (Click the icon to view the data.) 1. Compute the (a) variable manufacturing cost of goods sold, (b) contribution margin, and (c) operating ihcome. expense, mfg= manufacturing.) (b) Compute the contribution margin. (Abbreviations used: admin. = administrative; exp= expense; mfg. = manufacturing) Data table