Solution:
The activity rate for the Order Filling activity cost pool under activity-based costing is closest to:
Machining Order Filling Other
Equipment depreciation $ 40,600 $ 24,360 $ 16,240
Supervisory expense $ 5,600 $ 2,240 $ 3,360
Total OH $ 46,200 $ 26,600 $ 19,600
Activity cost pool OH Cost (a) Activity Activity rate a/b
Order filling (Orders )$ 26,600 2,890 $ 9.20