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: ['U', '9593', '2079', '5959', 'T', '5849', 'w', 'b', '9743', '6689', 'k', 'J']

A: 39912
****
Q: ['3071', '355', 'e', '9781', 'R', '6833', 's', '2665', 'L', '9551', 'P', '6101', '2955', '4643', 'O', '3327', '2163', '685', '4277', 'B']

A: 56407
****
Q: ['4097', '2433', '9667', 'G', 's', '5747', '9271', 'z', '113', '435', 'k', 'r', '7971']

A:
39734
****