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: ['3723', 'v', 'j', 'e', '2017', 'd', '4211', '2079']

A: 12030
****
Q: ['o', 'O', 'H', '7619', '6435', 'X', 'g', '1663']

A: 15717
****
Q: ['Q', '7239', '6901', '3793', '3393', 'O', '6651', '1213', '4869', '3401', 'w', '4315']

A:
41775
****