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.

[Q]: ['v', 'a', 'O', 'S', 'r', 'T', 'r', 'K', 'K', '7781', '1749']
[A]: 9530


[Q]: ['c', '4501', 'O']
[A]: 4501


[Q]: ['6961', 'L', '261', '3523', '5915', 'K', 'G', '4587', 'm', 'm', 'j', '1687', '8501', 'L', 'x', '5141']
[A]:
36576