The information given was: E9-5 - Gotham Company purchased a new machine on October 1, 2017, at a cost of $90,000. The company estimated that the machine has a salvage value of $8,000. The machine is expected to be used for 70,000 working hours during its 8-year life. In the screenshot below part B, it is asking me to solve for the units of activities for 2017 assuming the machine usage was 480 hours. I started to solve this problem by first finding the depreciation value and got stuck after that. My Question is how would I calculate the units of activity in 2017?

*E9-20 Basic information relating to a new machine purchased by Gotham Company is presented in E9-5. Instructions Using the facts presented in E9-5, compute depreciation using the following methods in the year indicated. (a) Declining-balance using double the straight-line rate for 2017 and 2018. (b) Units-of-activity for 2017, assuming machine usage was 480 hours. (Round deprecia- tion per unit to the nearest cent.)