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: ['D', 'G', '9895', '143', '37', 'S', '1539', 'x', 'a', 'x', 'B', 'i', '9719', '839']

A: 22172
****
Q: ['N', '1337', 'C', 'T', '863', 'j', '2369', 'P', 'A', 'x', '5725', '2333', 'Q', '9149', 'Q', '8529', 'N']

A: 30305
****
Q: ['9755', '5057', '9601', 'a', '1999', '8137', 'D', 'Z', '2219', 'c', 'L', 'H', 'N', '7947', '345', 'K', 'M', 'U']

A:
45060
****