Calculator A firm operated at 80% of capacity for the past year during which fixed costs were $330,000, variable costs were 70% of sales, and sales were $1,000,000 Operating income (loss) was Os $(30,000) b. $370,000 O $670,000 Od $140,000 New Tab Content Content Untitled document Calculator A firm operated at 80% of capacity for the past year, during which fixed costs were $330,000, variable costs were 70% of sales, and sales were $1,000,000 Operating income (loss) was O. (30,000) D. $370,000 Oc. 5670,000 Oa. $140,000 1:26 (hp)