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: ['z', '3199', 'r', '849', 'C', 'v', '1931', 'M', 'Q', '4531', '579', 'x', '8997', '4663']

A: 24749
****
Q: ['6565', 'T', 'O', '2901', '5121', 'y', '9617', 't', '7825']

A: 32029
****
Q: ['Q', 'd', '6537', '3505', '6897', 'm', '6123', '7157', 'h', 'J', 'X', 'Y', 'L', '2967', '501', '7289', 'e', 'S', 'P']

A:
40976
****