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: ['n', '6729', 'p', 'D', 'o', '1213', 'e', '6951', '2341', '9997', 'e', 'M', 'x', 'R']

A: 27231
****
Q: ['9125', '1443', '2303', 'O', '8463', '401', '3983', 'g', '4327', 'z', 'n', 'F', 'Q', 'j', '9885']

A: 39930
****
Q: ['575', 'f', '1981', '9233', '3141', '4617', '7073', 'h']

A:
26620
****