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.

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

['n', '6729', 'p', 'D', 'o', '1213', 'e', '6951', '2341', '9997', 'e', 'M', 'x', 'R']
27231

['1685', '8505', 'E', 'D', 'N', '5631', '7395', 'y', 'N', '1419', 's', 'M', 'o', '7697', '451']

32783