Need help working this problem out, I chose the correct answer, i just need some clarification. Thank you!

For its inspecting cost pool, davidson, Inc. Expected overhead cost of 300,000 and 4,000 inspections. The actual overhead cost for that cost pool was 360,000 for 5,000 inspections. The activity based overhead rate used to assign the costs of the inspecting cost pool to products is ?

C) 75 per inspection - This is the correct answer