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: ['Y', 'X', 'd', 'N', '1877', '2865', 'M', '1249', '9385', 'v', 'o', 'P', 'P', '6029']

A: 21405
****
Q: ['H', 'u', '9277', 's', 'y', 'L', 'B', 'z', 'N', 'k', 'S', '9299', 'D', '3715']

A:
22291
****