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: ['4177', 'd', 'b', 'm', 'f', 'R', '797', '7905', '4355', '7515', '9801', 'F', 'R', '9125', '8445', 'k', 'K', 'K']

A: 52120
****
Q: ['8755', 'A', '2893', '6703']

A: 18351
****
Q: ['8699', 'b', '6689', '3261', 'K', '3941', '6819', '2365', '3999', '589', '2765', '7745', '419']

A:
47291
****