8. The following data pertain to activity and costs for two months: Activity level in units Variable costs Fixed costs Mixed costs Total costs October 5,000 November 10,000 $10,000 ? 30,000 ? 20,000 ? $60,000 $75,000 Assuming that these activity levels are within the relevant range, what were the mixed costs for November? A) $20,000. B) $25,000. C) $35,000. D) $40,000