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: ['I', '7815']

A: 7815
****
Q: ['9903', 'H', '757', 'J', '6481', '9789', 'H', '3285', 'V', 'X', '5229', '7197']

A: 42641
****
Q: ['8701', '5889', '2997', 'F']

A:
17587
****