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:
['9905', 'm', 'Q', 'S', 'T', '7821', '1773', '9515', '3963', '2931', '7023', '8677', '1739', 'O', '909', '9153', '8319', 'k', '2851']

Ex Output:
74579

Ex Input:
['j', 'A', 'L', 'i', 'I', '3827', '8245', 'H', 'J', '8117', 'w', '4659', 'Y', 'x', 'K']

Ex Output:
24848

Ex Input:
['M', 'v', '3193', '285', 'i', '9241', 'O', '1813', '1133', 'C', '3035', '6189', 'd', 'd', 'D', '5055', '9709']

Ex Output:
39653