Cant figure out part B. Please explain the answer you get. Thanks

Metlock Industries has the following patents on its December 31, 2016, balance sheet. Date Acquired Patent Initial Useful Life at Cost Date Acquired 17 years 10 years 4 years Item Patent A443,656 3/1/13 $16,680 7/1/14 $21,120 9/1/15 Patent Patent The following events occurred during the year ended December 31, 2017 1. Research and development costs of $244,000 were incurred during the year 2. Patent D was purchased on July 1 for $40,698. This patent has a useful life of 91/ 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, 2017. The controller for Metlock estimates the expected futur from Patent B will be as follows. Expected Future Cash Year 2018 2019 2020 Flows $2,050 2,050 2,050 The proper discount rate to be used for these flows is 8%. (Assume that the cash flows occur at the end of the year. ? (a) Your answer is correct. Compute the total carrying amount of Metlock' patents on its December 31, 2016, balance sheet. (Round answer to decimal places, e.g. 8,564.) Total carrying amount60,402 SHOW ANSWER LINK TO TEXT LINK TO TEXT Attempts: 1 of 6 use Compute the total carrying amount of Metlock patents on its December 31, 2017, balance sheet. (Round answer to 0 decimal places, e.g. 8,564.) Total carrying amount