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: ['29', 'N', '5061', '7191', 'z', '8367']

A: 20648
****
Q: ['3809', '9401', '63', '5705', 'u', '6275', 'k', 'l', '1171', '9365', 'L', 'O', '7431', '8567', 'h', '6135']

A: 57922
****
Q: ['5749', 'l', '3297', '8913', '4625', 'M', 'X', 'g', '3143', 'i', '8369', '6101', 'w', '3683', '3891', '1399', '9105', '6923', 'K']

A:
65198
****