Zanny Mouldings has the following estimated costs for the year ahead:

Directly used materials	$25,100
Direct labor costs	$62,300
factory chief salary	$37,800
Ad spend	34.000 $
Heating and lighting costs for the factory	$22,900
Depreciation of factory equipment	$5,900
Sales commissions	$8,300

The company estimates that while the direct working hours will be worked next year, 2.100 machine hours will be used throughout the year. 

What is the predetermined production overhead rate per machine hour?