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: ['4701', 'b', 'i', 'B', 'z', '7837', 'W']

A: 12538
****
Q: ['5829', '9755', '67', 'F', '6347', 'p', 'i', 'X', 'z', 'o', '2321', 'F', '6145', 'B', '3903']

A: 34367
****
Q: ['G', 'i', '3067', 'E', '7711', 'T', '4385', '9523', 'D', 'p', 'k']

A:
24686
****