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: ['773', 'e', '4451', 'S', 'I', 'r', 'e', 'V', 'Q', 'g', 'J', 'L', '7655', 'O']

A: 12879
****
Q: ['Q', '9787', '7533', '9489', 'C', '1753', '5121', '1405', '9267', '4815', 's', '5887']

A: 55057
****
Q: ['929', '6833', 'h', '6677', '6939', '4761', '7499', 'Y', '3507', '5543', '3919', 'b', '7475', '3711', '9507', '4509', '7431', '243', 'Z', 'l']

A:
79483
****