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: ['2097', '7815', 'f', '1705', '7553', 'C', 'n', '7091', '1253', 'z', '9229', 'H', 'N', '6481', 'H', 'M', 'G', '4527', '8537']

A: 56288
****
Q: ['1505', 'I', 'v', '4737', 'D', '9741', 'y', 'l', 'r', '3811', '8667', 'U']

A:
28461
****