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: ['t', 'x', '5629', 'k', '2003', 'v', '541', 'l', 'v', '7983', '677', '6173', 'z', 'J', 's', 'u', '2187', 'Y']

A: 25193
****
Q: ['y', 'p', '3553', '2155', 'b', 'R', 'j', 'V', 'U']

A: 5708
****
Q: ['8129', 'n', '53']

A:
8182
****