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]: ['8809', '4559', '2715', 'w', '9903', 'h', 'u', 'F', '9369', '6149']
[A]: 41504


[Q]: ['v', '3135', 'J', 'm', 'a']
[A]: 3135


[Q]: ['w', 'J', '5371', 'q', '3597', '3841', '8369', 'l', '5665', 'U', '4703', '7933', '9143']
[A]:
48622