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.

[EX Q]: ['2485', 'Q', 'G', '5533', 'Y', '21', 'D', 'S']
[EX A]: 8039

[EX Q]: ['U', '9593', '2079', '5959', 'T', '5849', 'w', 'b', '9743', '6689', 'k', 'J']
[EX A]: 39912

[EX Q]: ['9211', 'b', '2305', 'z', '4073', 'j', '7153', '7465', 'G', 'z', 'T', '5585', 'p', 'G', '8061', 'i', 'Q']
[EX A]:
43853