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.

['6165', 'x', 'u', 'n', 'V', 'B', '4039', 'l', '991', 'x', '335', '9011', 'K', '8725', 'a', '6291', 'j']
35557

['7067', 'E', 'C', '1879', 'Z', 'u', 't', '2053', '6769', 'r', '5207', '7009', 'H', '5587', 'i', 'M', '1357', 'A']
36928

['r', '5325', '8507', '7353', 'h']

21185