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.

Ex Input:
['w', '7301', '9411', 'z', 'g', 'X', '1045', 'l', 'F', 'M', 'R', '7957', 'e', '5145']

Ex Output:
30859


Ex Input:
['I', 'n', '3069', '477', 'F', 'k', '847', '6777', 'N', 'X', 'F', '1417', '9445', 'o', 'v', 'd', '2169', 'w']

Ex Output:
24201


Ex Input:
['l', 's', '225', 'b', 'C', 'R', 'g', 'M', '8767', 'G', '1521', '7367', 'J']

Ex Output:

17880