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: ['2225', '1925']

A: 4150
****
Q: ['y', 'F', '135', '7359', '8579', '6809', '3979', 'H', 'm', '5059', '373', 'Y']

A: 32293
****
Q: ['n', 'R', '7885', 'Y']

A:
7885
****