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.

['a', 'f', '2185', 'N', '6381', '6429', '7499', 'd', '757', 'k', 'k', 'b', 'N', '2697', 'A', '8037']
33985

['q', 'N', 'y', '7859', 'u', '2861', '4151', 'Q', 'x']
14871

['v', '2591', 'G', 'h', '4307', '8623', '8709', 'g', 'O']

24230