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:
['3895', 's', 'j', '7755', 'H', '7941', '4903', 's', '3629', '1183', '1001', '5569', 'q', '4735']

Ex Output:
40611


Ex Input:
['k', '4991', '7289', '4355', 'I', '8415', '5175', '5329', 'G', 'a', '7193', 't', '8821', 'j', '7239', '405', 'y', 'O', '9881', 'w']

Ex Output:
69093


Ex Input:
['1183', '5265', '815', 's', 'u', '7123', '201', 'n', 'v', 'd', '7901']

Ex Output:

22488