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', 't', 'W', '163', 'v']

A: 163
****
Q: ['9787', '1491', '4411', '5261', 'U', '9787', 'b']

A: 30737
****
Q: ['H', 'w', '8921', '1485', '1345', 'z', '8915', '6013', 'O', '403', '9003', '5341']

A:
41426
****