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.

['b', 's', 'v', '4757', '9063', 'I', '8397', '7975', 'Q']
30192

['G', 'e', 'R', '4427', '3401', '3065', 'I', '2781', '6829', '5261']
25764

['163', 'k']

163