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.

['8743', 'Y', 'O', '8265', '1029', '5689', 'F', 'j', 'Z', 'i', 'S', '1285', '737']
25748

['D', '8591', 'b', 'n', 'e', '883', '8923', '245', 'z', '5643', 'C', '2911', '9275', '711', '7299', '3449', '4799', '6065']
58794

['G', 'C', 'X', 'R', 'X', '3935', 'q', '2571', 'G', '8899', '2881', '1629', '7239', '2129', 'b', 'X', 'B', '3303', 'o']

32586