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: ['6255', '8457', 'V', 'z', '4405', 'X', '9267', '5329', 'I']

A: 33713
****
Q: ['t', '7469', 'Y', 'N', '8137']

A: 15606
****
Q: ['y', 'd', 'O', '5639', 'E']

A:
5639
****