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.

['A', '6323', 'T', 'H', 'M', 'S', 'D', 'r', 'v', '8169', '7649', '5149', 'x', '6275']
33565

['4685', 'q', 'O', 'o', '3453', 'o', 'Y', 'C', 'a', 'i', '7283', 'J', 'n', 'Q', 'i']
15421

['H', 'I', '6529', 'F']

6529