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: ['6055', 'v', '9455', 'A', '6817', 'D', '9339', 't', 'K', '1993']

A: 33659
****
Q: ['9903', 'H', '757', 'J', '6481', '9789', 'H', '3285', 'V', 'X', '5229', '7197']

A: 42641
****
Q: ['B', 't', 'G', '4005', 'f', '1393', 'q', '5297', '9811', '681', '8961']

A:
30148
****