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.

Q: ['7231', '2813', '51', '1745', 'c', 'a', '4929', '3185', '5707', '2095', 'f', 'S']

A: 27756
****
Q: ['4685', 'q', 'O', 'o', '3453', 'o', 'Y', 'C', 'a', 'i', '7283', 'J', 'n', 'Q', 'i']

A: 15421
****
Q: ['k', 'N', 't', '7615', '749', '7531', '9973', '7497', 'Q', 'y', 'C', 'A', '3673', '3805', 'O', 'a', '5027']

A:
45870
****