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: ['4997', '5005', '6773', 'q', 'K', '8391', '7303', 'K', 'N', '5417', '8573', 'z', '8653', '8343', 'm', 'L', '1587', 'p', '5323']

A: 70365
****
Q: ['b', 'i', '7807', 'g', '1611', '6733', 'V', '561', 'C', '8575', 's', 'E', '8129', 'F']

A: 33416
****
Q: ['n', '1131', 'p', 'F', '7173']

A:
8304
****