Depletion excludes restoration costs from the depletion base. excludes intangible development costs from the depletion base. reduces the depletion base for natural resources. includes tangible equipment costs in the depletion base. Question 31 (1.54 points) Use the following information for questions 31 to 32 Grover Corporation purchased a truck at the beginning of 2014 for $93,600. The truck is estimated to have a salvage value of $3,600 and a useful life of 120,000 miles. It was driven 21,000 miles in 2014. What is the per unit cost? $0.80 $93,600 $0.75 $3,600 Question 32 (1.54 points) Grover Corporation purchased a truck at the beginning of 2014 for $93,600. The truck is estimated to have a salvage value of $3,600 and a useful life of 120,000 miles. It was driven 21,000 miles in 2014. What is the depreciation expense for 2014? $37,500 $21,750 $17,010 $15,750