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.

['8821', '7221']
16042

['6293', 'o']
6293

['9611', '7501', 'Q', 'z', '7475', '2525', '1809', 'L', 'y', '7953', '2031', '8057', '1685', '9807', '3425', '299', '2613']

64791