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]: ['2787', 'z', '9351', '3339']
[A]: 15477


[Q]: ['z', 'E', 'u', '4437', '7767']
[A]: 12204


[Q]: ['Z', '8209', 'J', '9459', 'V', 'h', 'y', 'v', '9795', '6543', 'b', '9011', 'i']
[A]:
43017