M5-7 (Algo) Estimating Cost Behavior [LO 5-2, 5-3] Castle Inc. has the following information: Month Cost A January February Amount $ 60,000 $120,000 Units 120,000 240,000 Cost B Month January February Amount $ 35,000 $ 35,000 Units 40,000 80,000 Cost C Month January February Amount $ 70,000 $ 98,000 Units 56,000 112,000 Indicate whether these costs are variable, fixed, or mixed. Cost A Cost B Cost C