On January 1, Year 1, Wolly Company purchased a truck that cost $67,000. The truck had an expected useful life of 100,000 miles over 8 years and a $5,000 salvage value. During Year 2, Wolly drove the truck 30,000 miles. The amount of depreciation expense recognized in Year 2 assuming that Wolly uses the units-of-production method is:

• $7,400
• $18,600
• $20,000
• $30,000