! Required information Jobe Concrete Products placed a new sand sifter into production 3 years ago. It had an installed cost of $100,000, a life of 5 years, and an anticipated salvage of $20,000. Book depreciation charges for the 3 years are $40,000, $20,000, and $18,000, respectively. If the sifter's market value today is $20,000, determine the difference between its current book value and its market value. The difference between its current book value and its market value is determined to be $