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: ['2175', '4539', 'L', 'T', 'q', '2407', 'F', 'V', 'b', '9475', '2279', '4469', '6231']

A: 31575
****
Q: ['o', 'a', 'K', '6031']

A: 6031
****
Q: ['Y', 'c', '4405', '2845', '5801', 'T', '8575', 'b', '9899', 'o', 'h', 'P', '6677']

A:
38202
****