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:
['s', '3607', 'p', 'P', '9285', 'J', 'l', '9863', '9823', '2817', 'g', '9751', '599', '2605', 'k', 'Y', 'O', 'U', '9649']

Ex Output:
57999


Ex Input:
['4089', '2385', 'E', 'K', '259', '295', '6649', '8645', 'n', '2577', '2683', '9041', 'Q', 'm', '4237']

Ex Output:
40860


Ex Input:
['9401', 'o', '1451', '8875', 'j', '87', 'U', 'L', '7305', '2233', 'Z', 'v', '7245', 'f', '4653', '9021', 'i', '9517']

Ex Output:

59788