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]: ['6255', '8457', 'V', 'z', '4405', 'X', '9267', '5329', 'I']
[A]: 33713


[Q]: ['q', 'Y', '6021', '4045']
[A]: 10066


[Q]: ['6853', 'b', 'I', '5757', '7941', '3239', 'c', '5959', '521', '9833', '3677', '1115', 'A', '7931', 'K']
[A]:
52826