Question 18 (3 points) Refer to Aggie, Inc. If Aggie uses the straight-line method, what is the book value at December 31, 2011? $ 8,000 O$ 6,000 $10,000 $ 4,000 Question 19 (3 points) Refer to Aggie, Inc. If Aggie uses the units-of-production method, what is the depreciation rate per hour for the equipment? $2.00 $2.20 $.20 O$.22 Question 20 (3 points) Refer to Aggie, Inc. If Aggie uses the double-declining-balance depreciation method, what amount is the depreciation expense for 2010? $8,800 $5,280 $3,728 $4,000 Aggie, Inc.Aggie, Inc. purchased a truck at a cost of $22,000. The truck has an estimated residual value of $2,000 and an estimated life of 5 years, or 100,000 hours of operation. The truck was purchased on January 1, 2009, and was used 27,000 hours in 2009 and 26,000 hours in 2010