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]: ['4463', '489']
[A]: 4952


[Q]: ['b', '5447', 'R', '8489', 'L', '627', 'P', '7491', 'c', 'c', 'r', '6923', '1167']
[A]: 30144


[Q]: ['L', '3587', 'L', 'X']
[A]:
3587