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: ['r', '2251', 'X', 'H', 'a', '5463', 'g', 'M', '9797', '1581', 'o', 'm', 'v', 'E']

A: 19092
****
Q: ['6367', '9923', '9141']

A: 25431
****
Q: ['w', 'f', 'u', 'S', '7777', '3323', '8355']

A:
19455
****