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: ['W', '4453', '5895', 'Z', 'A', '7663', '2749', 'f', 'H', '6917', '1215', 'M', '1775', '5397', 'l', '8197', '5209', '8229', 'U']

A: 57699
****
Q: ['w', '1335', 'G', 'h', '6729', '1999', 'u', 'I', 'r', 'm', '4757', 'W', '3715', '701', '1999']

A: 21235
****
Q: ['1553', '2115', 'i', '2465', '6711', 'd', 'K', 'U', '9211', '2987', '6799', 'e', 'g', 'e', 'j', '5115', '5495']

A:
42451
****