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.

['v', 'a', 'O', 'S', 'r', 'T', 'r', 'K', 'K', '7781', '1749']
9530

['2913', 'b', 'j', '7591', 'O', 's', '5589', '4995', '7503', 'U', 'S', 'C', '6797']
35388

['2165', 'E', 'q', '107', 'H', 'A', 'O', '4743', '2977', 'x', '7939', '8321', 'c', 'Q', '6665']

32917