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]: ['9125', '1443', '2303', 'O', '8463', '401', '3983', 'g', '4327', 'z', 'n', 'F', 'Q', 'j', '9885']
[A]: 39930


[Q]: ['4529', '7465', 'S', 'Z', 'v', 'w', '5791', '3363', '2643']
[A]: 23791


[Q]: ['x', 'F', '2913']
[A]:
2913