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: ['s', '425', '6135']

A: 6560
****
Q: ['A', '771', 'Q', 'b', '9929', '4991', 'q', '9863', '4363', '5721', 'C', '991', 'j', 'r', 'Q', 'B', 'K']

A: 36629
****
Q: ['B', 'X', '2289', '8187', 'w', '4861', 'M', '3731']

A:
19068
****