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: ['Y', 'X']

A: 0
****
Q: ['A', '9775', '5867', 'n', '1329', '5973']

A: 22944
****
Q: ['315', '7039', '7933', 'A', 'Q', '5649', 'A']

A:
20936
****