An airplane costs $75 million and is expected to fly 750 million miles during its 12-year life. Residual value is expected to be zero because the plane was used when acquired. If the plane travels 45 million miles the first year, how much depreciation expense should be recorded under the units-of-production method?

a. $6.25 million

b. $10 million

c. $4.5 million

d. Cannot be determined from the data given AppendixLO1