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:
['A', '9775', '5867', 'n', '1329', '5973']

Ex Output:
22944


Ex Input:
['1203', '6179', '9835']

Ex Output:
17217


Ex Input:
['T', 'P', 'u', 'c', '565', 'Y', '2427', 'm', '7425', 'c', '2571', '8321', 'X', 'v', 'S']

Ex Output:

21309