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: ['3451', '2325', '2511', 'i', '6159', '2291', 'e', 'l', 'P', '1177', 'o', 'T']

A: 17914
****
Q: ['Y', '9053', 'N', '6921']

A: 15974
****
Q: ['b', '2975', '4583', '545']

A:
8103
****