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: ['I', '7815']

A: 7815
****
Q: ['X', '6189', '5435', 'y', '8931', '8987', 'F', '8377', 'k', '8631', '8717', 'q', '2923', 'g', '7225', 'j']

A: 65415
****
Q: ['6233', 'm', '9409', '5857', 'h', 'M']

A:
21499
****