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:
['2923', '3573', '6179', '7673', '6551', 'B', '315', '5169', 'm', '9405', 'm', 'Z']

Ex Output:
41788


Ex Input:
['7973', 'J', '9035', 'H', '4051', '2661', 's', 'z', '8225', 'M', '4153']

Ex Output:
36098


Ex Input:
['o', 'S', 'v', '4667', 'F', '5259', '1473', '2821', 'D', 'y', 'Z', '4859', 'c', '5053', '9131', 'Y']

Ex Output:

33263