Marin Industries has the following patents on its December 31, 2019, balance sheet. Patent Item Initial Cost Date Acquired Useful Life at Date Acquired Patent A $41,208 3/1/16 17 years Patent B $15,240 7/1/17 10 years Patent C $15,360 9/1/18 4 years The following events occurred during the year ended December 31, 2020. 1. Research and development costs of $232,000 were incurred during the year. 2. Patent D was purchased on July 1 for $30,438. This patent has a useful life of 91/2 years. 3. As a result of reduced demands for certain products protected by Patent B, a possible impairment of Patent B's value may have occurred at December 31, 2020. The controller for Marin estimates the expected future cash flows from Patent B will be as follows. Year Expected Future Cash Flows 2021 $1,900 2022 1,900 2023 1,900 The proper discount rate to be used for these flows is 8%. (Assume that the cash flows occur at the end of the year.)