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.

['2215', '4369', 'e', '4979', '4069', 'J', 'L', '789', 'w', 'p', '9533', '8523', '2531']
37008

['5499', '39', 'Q', 'b', 'W', '7155', '2515']
15208

['H', 'V', '9649', '977', 'G', 'b', 'r', 'n', 'a', 'o', '5107', 'T', '8017', '7903', 'o', '2009', 'P', '4289', 'W', '2931']

40882