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]: ['191', 'R', 'Q', '7809', '4851', 'b', 'e', 'H', 'E', 'I', 'r', 'A', 'g', 'e', 'g', 'I', 'j', 'f', '7287']
[A]: 20138


[Q]: ['4869', 'L']
[A]: 4869


[Q]: ['6799', 'B', '9381', 'O', '3865', 'B', '527', 'D', 'o', '8107', 'L', '1285', '7131', 'V', '8945']
[A]:
46040