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: ['8529', '2657', '1599', 'b', '8187', '7005', '7481']

A: 35458
****
Q: ['x', '9895', 'r', 'H', 'C']

A: 9895
****
Q: ['6489', 'H', 'T', '8065', 'L', 'g', '2889']

A:
17443
****