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:
['Z', 'w', 'M', '2233', '5275', '5277', 's', '971', '7085', '6259', 'V', 'E', '4923', '7365', 'c', 'd', 'c', 'U', 'P']

Ex Output:
39388


Ex Input:
['6731', 'f', '4561', '5601', 'i']

Ex Output:
16893


Ex Input:
['X', '4163', 'r', '5367', '3979', '2255', '7199', '5849', 'N', '5709', '9197', '1353', '1497', '6123', '137', 'y', 'u', 'B', '9267']

Ex Output:

62095