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: ['h', '2335', '2669', '6035', '9901', '7721', 's', '6181', 'C', 'l', 'x', '8275', '1103', 'S', '6447']

A: 50667
****
Q: ['3557', '3345', '307', '9791', '1897', 'O']

A: 18897
****
Q: ['3623', '5995', 'f', '5777', '9511', 's', '3453', 'E', '1963', '1639', 'L', '6787', 'v', '8751', '2827', '7945']

A:
58271
****