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: ['8821', '7221']

A: 16042
****
Q: ['q', 'Y', '6021', '4045']

A: 10066
****
Q: ['39', 'o', '4815', '3003', 't', '2301']

A:
10158
****