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: ['7459', '491', '7823', '6965', 'H', '109', 'R', 't', '3959', '2821', 'R', '2807', 'o', 'v', '1305', 'a', '1411', 'r', '3669']

A: 38819
****
Q: ['x', '5259', 'T', 'L', 'C', 'H', '2493', 'u', '3851', '2439', 'U']

A: 14042
****
Q: ['p', '8411', '2799', 'm', 'q', '2931', 'n', '5917', '6663', '3999', 'H', '7655', 'i', 'u', '5057', '2415', '7543']

A:
53390
****