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: ['6321', 'M', 'd', '3673']

A: 9994
****
Q: ['1671', 'H', '9271']

A: 10942
****
Q: ['c', 'H', '5109', 'v', 'C', '7719', 'X', 'f', '6713']

A:
19541
****