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: ['4271', 'N', 'M', '5239', '7037', 'x', 'U', 's', '7107', '4163', 'f', '3607', '6155']

A: 37579
****
Q: ['A', '9785', '1739', 'x', '2389', 'O', 'J', '1407', '9067', 'x', '9747', '2485', '4631', '6021', '4077', '2779', 'V', '2449', '7401']

A: 63977
****
Q: ['e', 'D', '4619', 'F', 'W', '1837', 'M']

A:
6456
****