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.

['v', 't', 'a', 'r', 'O', 'I']
0

['g', 'h', '9141', '7825', 'a', 'u', '2389', 'r', '9739', '8337', 'Z', 'Z', '6717']
44148

['G', 'm', 'I', 'q', 'w', 'j', '2507', '2861', '8107', '8619', 'A', '6557', '3207', '9671', '2783', '7249', '4303']

55864