Records from previous periods show the following relationship between machine hours and maintenance costs Machine hours 15,550 12.900 11,100 18,500 Maintenance costs 29,050 $29.850 27,530 $37,150 Source: adapted from Chartered Institute of Management Accountants, Paper Pl. Performance Evaluation Required: using High-Low method The estimated maintenance costs for 27.500 machine hours are: 48.850 45.900 O 34.250 O 63,450