On January 1, Speedy Delivery Company purchases a delivery van for $39,200. Speedy estimates that at the end of its four-year service life, the van will be worth $6,600. During the four-year period, the company expects to drive the van 163,000 miles. Actual miles driven each year were 42,000 miles in year 1 and 48,000 miles in year 2. Required: Calculate annual depreciation for the first two years using each of the following methods.

1. straight line

2. double declining balance

3. activity based