QUESTION 4 Equipment with a cost of $160,000, an estimated residual value of $40,000, and an estimated life of 15 years was depreciated by the straight- line method for four years. Due to obsolescence, it was determined that the remaining useful life should be shortened by three years and the residual value changed to zero. The depreciation expense for the current and future years is O a. $11,000 b. $8,000 c. $16,000 d. $11,636 QUESTION 5 Weber Company purchased a mining site for $1,750,000 on July 1. The company expects to mine ore for the next 10 years and anticipates that a total of 400,000 tons will be recovered. The estimated residual value of the property is $150,000. During the first year, the company extracted 6,500 tons of ore. The depletion expense is Oa. $26,000 Ob. $17,500 Oc$16,000 Od. $15,000