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: ['g', 'A', 'm', '4005', '8079', 'G']

A: 12084
****
Q: ['5573', '6221', 'C', '8649', '6603', 'q', '9403']

A: 36449
****
Q: ['P', 'G', 'm']

A:
0
****