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]: ['887', '8133', 'X', '2253', '8461', 'I', '5425', 'Z', 'z', 'r']
[A]: 25159


[Q]: ['3497', '761', '6157', 'J', 'n', '139', '9895', '2939', 'K', 'I', '2161', 'c', 'a', '485', '7959', 'i', '4753', '3305', 'G', '3475']
[A]: 45526


[Q]: ['x', '4639', 'm']
[A]:
4639