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.

['7379', 'I', '2031', '8419', 'w', 'b', '9827', 'X', 'Y', 't', '3789', 'B', 'c', '6599', 'F', '6169', 'V']
44213

['9869', '7701', 'H', 'o', 'v', '1431', 'O', 'L']
19001

['H', 'D', '5433', 'E', 'x', 's', '5733', '1291', '1803', '5289', 'k', 'Q', 'B', '4007', 'k']

23556