Definition: In this task, you are given an input list A. You need to find all the elements of the list that are numbers and calculate their sum.
Input: ['D', 'U', '4645', '7471', 'G', '2037', 'M', 'b', '441', 'V', '2025', 'J', '4739', '1433', 'A', '6081']
Output:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
28872