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: ['D', '5207', 'E', '119', 'g', '2991', 'G', 'g', 'u']

A: 8317
****
Q: ['2871', '1337', '3771', '4671', 'l', '3785', 'V', 'z', 'R', 'u', '6097', 'R', '4297', 'd', '6339', 'Y', 'V', '5873', '7399']

A: 46440
****
Q: ['8117', 'J', '7779', 'n', 'o', '9645', '1339', '9473', '5249', 'L', '4609', 'd']

A:
46211
****