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.
One example: ['238', 'h', '92', 'U', '2799']
Solution is here: 3129
Explanation: Here, the numbers in the input list are '238', '92' and '2799', hence their sum (238+92+2799) is 3129.

Now, solve this: ['x', '5259', 'T', 'L', 'C', 'H', '2493', 'u', '3851', '2439', 'U']
Solution:

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
14042