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.

['a', 'f', '2185', 'N', '6381', '6429', '7499', 'd', '757', 'k', 'k', 'b', 'N', '2697', 'A', '8037']
33985

['M', '6989', 'I', 'w', '3591', '3067', '3883', 'C', '6049', '5723', 'j', '5989', 'C', 'R', '475', '7779', '671']
44216

['3813', 'v', 'h', '3679', 'S', 'X']

7492