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: ['Q', 'v', 't', '223', 'm', 'l', 'c', 'M', 'b', '2227', 'P', 'e', 'n', 'f', 'S', '2205', '3517', '5545']

A: 13717
****
Q: ['8739', 'K']

A: 8739
****
Q: ['x', '3113', '3499', '4025', 'O', '7895', '6321', 'Y', 'w', 'm', 'L', '9587', '6741', '3863', 'U', '5473', '3765']

A:
54282
****