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: ['2871', '1337', '3771', '4671', 'l', '3785', 'V', 'z', 'R', 'u', '6097', 'R', '4297', 'd', '6339', 'Y', 'V', '5873', '7399']

A: 46440
****
Q: ['4241', 'E', '1807', '2877', '5125', '7625', 'S', '401', '5081', 'u', 'R', 'F']

A: 27157
****
Q: ['8693', '5839', 'v', '8289', '5637', 'R', '8837', '2325', '8965', '7235', 'X', 'V', '7139', 'S', 'j', 'I', 'K', '6907', 'D']

A:
69866
****