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: ['s', 'd', 't', '8235', '2279', '7477', '3029', '4377', '9153', '4309', '2295', '407']

A: 41561
****
Q: ['U', '5885', 'u', 'Y', 's', 'w', 'j', '9629', '9505', 'U']

A: 25019
****
Q: ['8559', '8137', '4927', 'W', 's', 'h', 't', '6219', '3427', 'Q', 'L', '5345', '4361', '1681', '6147', '63', '2039', '5949', '1539']

A:
58393
****