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.

['K', 'O', 'p', '1669', '8647', '3417', 'a', '8903', 'V', 'E', 'l', 'a', '5177', 'J', '6559', '5377', 'X', '9427']
49176

['n', 'u', '9595', 'M', 'o', 'K', '5073', 'x']
14668

['h', 'b', '8903', '7241', '9017', '4917', 's', '7121', 'v', 'q']

37199