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: ['s', '425', '6135']

A: 6560
****
Q: ['D', 'K', 'n', 'd', 'i', 'U']

A: 0
****
Q: ['8255', '1181', '8685', '271', '1801', '3909', '841', '8917', '885', 'G']

A:
34745
****