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]: ['1875', '9833', 'i', '7493', 'J', 'P', 'z']
[A]: 19201


[Q]: ['b', 's', 'v', '4757', '9063', 'I', '8397', '7975', 'Q']
[A]: 30192


[Q]: ['A', '6323', 'T', 'H', 'M', 'S', 'D', 'r', 'v', '8169', '7649', '5149', 'x', '6275']
[A]:
33565