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:
['W', '3629', '6053', '1035', '1717', 'n', 'y', '9585', 'D', '5125', 's', '9801', '2905', 'E', '5797', 'T']

Ex Output:
45647


Ex Input:
['M', '9933', '9861', 'f', 'N', 'R', '7625', 'p', 'T']

Ex Output:
27419


Ex Input:
['M', '1161', '9839', '45', 'R', '543', 'n', 'M', '789', '2455', '3655', '6567']

Ex Output:

25054