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:
['1493', 'x', 'h', '31', '3327', '1621', '4529', 'd', '377', 'R', 'X', 'Z', 'G']

Ex Output:
11378


Ex Input:
['M', '6989', 'I', 'w', '3591', '3067', '3883', 'C', '6049', '5723', 'j', '5989', 'C', 'R', '475', '7779', '671']

Ex Output:
44216


Ex Input:
['6905', '433', '4721', 'Y']

Ex Output:

12059