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: ['O', '6337', 'j', '6009', 'z']

A: 12346
****
Q: ['P', '237', 'X', '8893', '7931', 'F', '8359', 'S', '6931', '6953', 'r']

A: 39304
****
Q: ['1897', 'K', '9663']

A:
11560
****