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.

['2765', '6767', '7645']
17177

['v', 'a', 'O', 'S', 'r', 'T', 'r', 'K', 'K', '7781', '1749']
9530

['1817', '7619', 't', 'D', '4897', '1757', 'D', 'h']

16090