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: ['8109', '6811', 'f', 'l', '5869', 'm', '4657', 'y', 'P', '7983', 'o', 's', 'i', 'm', '2141', '4497']

A: 40067
****
Q: ['3497', '761', '6157', 'J', 'n', '139', '9895', '2939', 'K', 'I', '2161', 'c', 'a', '485', '7959', 'i', '4753', '3305', 'G', '3475']

A: 45526
****
Q: ['3979', 'P', '4879']

A:
8858
****