Expenditures After Acquisition Roanoke Manufacturing placed a robotic arm on a large assembly machine on January 1. At that time, the assembly machine was expected to last another 3 years. The following information is available concerning the assembly machine. Cost, assembly machine $750,000 480,000 Accumulated depreciation, Jan. 1 The robotic arm cost $210,000 and was expected to extend the useful life of the machine by 3 years. Therefore, the useful life of the assembly machine, after the arm replacement, is 6 years. The assembly machine is expected to have a residual value of $117,000 at the end of its useful life. Required: 1. Prepare the journal entry necessary to record the addition of the robotic arm. If an amount box does not require an entry, leave it blank. Jan. 1 Equipment 117,000 X Cash 117,000 X Feedback 2. Compute the revised amount of depreciation expense for the machine using the straight-line method. 64,500 x Feedback Prepare the necessary journal entry to record depreciation expense. If an amount box does not require an entry, leave it blank. Dec. 31 Depreciation Expense 64,500 X Accumulated Depreciation 64,500 X Feedback 3. What is the book value of the machine at December 31? 322,500X