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.

['3107', 'D', '9595', '8807', 'Q', 'o', 'T', 'N', 'A']
21509

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

['9899', 't', 'i', '6979', '3245', '9401', '7129', '6361', '8369', '1757']

53140