Calculate the revised annual depreciation expenses for each asset in 2018 and compare them to what the expenses would be if the changes were not made.

10.5 Effects of Changes in Estimates on Depreciation Expense At the end of each year, Patty Chu, the chief accountant at Rex Lin Enterprises, a Singapore-based trading company, reviews long-term assets at the end of each year to determine whether changes are called for in how these assets are depreciated. In December 2017, her attention focused on two assets in particular: Accumulated depreciation Date acquired Cost end of 201 7 Useful life Residual value Warehouse 1/1/13 $200,000 $50,000 25 years $10,000 Building 1/1/12 1,600,000 223,000 40 years 100,000 Patty is proposing the following changes: For the warehouse: a decrease in the useful life to 20 years and a decrease in residual value to $6,000. For the building: an increase in the useful life to 50 years and a decrease in the residual value to $55,000. Before agreeing to the changes, Patty's bosses would like to know what the depreciation charges will be for each asset if the changes are adopted. All assets are depreciated using the straight- line method. Required Calculate the revised annual depreciation expenses for each asset in 2018 and compare them to what the expenses would be if the changes were not made. 10.6 Interpreting Disclosures for Property. Plant, and Equipment Petrobras, which operates in the energy sector, is Brazil's larg- est company. Its shares trade on several of the world's leading stock exchanges. A portion of Petrobras' balance sheet, its income statement, and extracts from a note on PP&E are presented in Exhibit 10.1. Required Based on the information provided, answer the following ques- tions: a. What portion of Petrobras' \"Equipment and other assets\" had been "used up\" by the end of scal 2008