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.

['9401', 'w', 'b', '8287', 'n', 'O', 'H', 'h', '45', '2337']
20070

['g', 'A', 'm', '4005', '8079', 'G']
12084

['8897', '6051', '7829', '7721', '7907', '4033', 'r', 'I']

42438