1.87 points 1 M5-7 (Algo) Estimating Cost Behavior [LO 5-2, 5-3] Castle Inc. has the following Information: eBook Month Cost A January Amount $31,000 Units 40,000 February $ 31,000 80,000 Cost B Month January February Amount $ 44,000 Units 88,000 $ 88,000 176,000 Print Month Amount Units References Cost C January $ 62,000 49,600 February $ 86,800 99,200 Indicate whether these costs are variable, fixed, or mixed. Cost A Cost B Cost C