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: ['Z', '6245', 'N', '1403', 'b']

A: 7648
****
Q: ['3451', '2325', '2511', 'i', '6159', '2291', 'e', 'l', 'P', '1177', 'o', 'T']

A: 17914
****
Q: ['H', 'X', '5105', 'W', '4083', 'G', 'C', '5385', 'Z', 'b', '7585', '1831', 'U', 'p', '5779']

A:
29768
****