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:
['2151', '7511']

Ex Output:
9662


Ex Input:
['4177', 'd', 'b', 'm', 'f', 'R', '797', '7905', '4355', '7515', '9801', 'F', 'R', '9125', '8445', 'k', 'K', 'K']

Ex Output:
52120


Ex Input:
['z', '4855', 'H', '4327', 'S', 'E', '9635', '2931', 'V', '5481', 'e', '4881', '3033', '5309', '9759', '9909', '6949', 'o']

Ex Output:

67069