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: ['Y', 'X']

A: 0
****
Q: ['8669', '9115', '2573', '9261']

A: 29618
****
Q: ['1575', 'M', '975', '7247', 'V', 'D', '8941', 'g', 'i', '2745', '2567', 'n', '4621', '3153', '8197', '6541']

A:
46562
****