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:
['8665', '6083', '9819', 'H', 'p', 'S', 'R', '4311', 'R', '7193']

Ex Output:
36071


Ex Input:
['x', 'd', '5121', 'I', '6737', '3789', '6167', 'C', '8947', 'k', '4715', '1885', 'H', 'B', '5685', 'S', '4615', 's', '7709']

Ex Output:
55370


Ex Input:
['1809', 'v', 'R', 'x', '9905', 'w', '2961', 'l', '5229', '3705', 'Z', '4643', 'u', 'P', 'n', '9487']

Ex Output:

37739