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: ['R', '9751', '4367', 'l', 'N', '5125', '8751', '7507', 'y', 'K', '6127']

A: 41628
****
Q: ['4601', '6021', '3005', 'I', 'f', '4631', 'Q', 'd', '8041', 'D', '8067', '7383', '757', 't', 'd', 'n', '2275', 'p', 'm', '6021']

A: 50802
****
Q: ['S', 'E', '1221', 't', 'v', 'i', 'H', '7647', '6975', 'Z', 'e', '7189', '7425', 'e', 't', '4779']

A:
35236
****