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]: ['9869', '7701', 'H', 'o', 'v', '1431', 'O', 'L']
[A]: 19001


[Q]: ['B', 'K', '9399', 't', '5541', 'w', '1939', '7841', 'q']
[A]: 24720


[Q]: ['4009', 'C', '7413', 'P', '2079', '8895', 'c', 'g', '1269', 'j', '2949', '207', '3711', 's', 'q', '7391', 'b', 'x', 'B']
[A]:
37923