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]: ['E', 'y']
[A]: 0


[Q]: ['4177', 'd', 'b', 'm', 'f', 'R', '797', '7905', '4355', '7515', '9801', 'F', 'R', '9125', '8445', 'k', 'K', 'K']
[A]: 52120


[Q]: ['57', 'X', 'p', '6113', 'u', '5095', '6099', '9813']
[A]:
27177