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: ['9863', 'y']

A: 9863
****
Q: ['z', '9173', 's', '8937', 'h', '1881', '7929', 'b', '2441']

A: 30361
****
Q: ['U', '9825', 'H', '8511', '1433', 'z', 'H']

A:
19769
****