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.

['J', 'S', 'S', 'U', 'w', '7691', '7529', 'B', '3861', '4557', 'd', '569', '1547']
25754

['5947', 'n', '9431', '7629', '7643', 'N', '141', '2353', 'l', 'F', '9665', '9489', 'X', '4905', 'H', 'L', '985']
58188

['7721', '6215', '7347', '6545', '6185', '7393', '4733', 'Q', '7397', '3765']

57301