Swan, Inc. uses the high-Iota\"r method to analyze cost behavior. The company' observed that at 20,000 machine hours of activity, total maintenance costs averaged $33.90 per hour. When activity jumped to 21000 machine hours. which was still within the relevant range. the average total cost per machine hour was $20.90. On the basis of this information, the variable cost per machine hour for Swan was: [Round your nal answer to 2 decimal places.) Multiple Choice 0 $20.50. $23.50. $26.90. $6.90. 0000 $33.90