Data for Cost A and Cost B appear below: Units Produced Cost Per Unit Total Cost Cost A ? 10 10 ? 100 A A A A 100 ? 1,000 $ 10,000 1,000 ? Cost B 1 ? 5,000 500 10 ? A A A A 50 ? 100 1,000 5 ? Which of the above best describes the behavior of Costs A and B? Cost A is variable, Cost B is fixed. Both Cost A and Cost B are variable. Both Cost A and Cost B are fixed. Cost A is fixed, Cost B is variable. At an activity level of 6,900 units in a month, Zelinski Corporation's total variable maintenance and repair cost is $408,756 and its total fixed maintenance and repair cost is $230,253. What would be the total maintenance and repair cost, both fixed and variable, at an activity level of 7,100 units in a month? Assume that this level of activity is within the relevant range. $657,531 $648,270 $650,857 O $639,009 2020 McGraw-Hill Education. All rights reserved