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', 'p', '3553', '2155', 'b', 'R', 'j', 'V', 'U']

A: 5708
****
Q: ['6645', 'k', '4879', 'N', '113', 'L', 'x', '8365', 'v', 'A']

A: 20002
****
Q: ['9679', 'O', '9791', 'b', '3837', 'Y', 'f', '771', '6155', 'j', 'Q', 'f', 'n', '9197', '6781', 'v', '7271', '2893', '3065', 'u']

A:
59440
****