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.

['2039', '1679', '9675', 'S', 'J', '2069', 'r', 'e']
15462

['v', '3135', 'J', 'm', 'a']
3135

['9511', '4879', 'a', '9139', '1', '1291', 'G', 'e', '2805', 'I', 'g', 'z', 'q', '2087', 'b', 'C', 'j']

29713