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]: ['3351', '6445', 'Y', '8455', 'V', 'z', 'a', 'V', 'S', '8551', '4101', 'q', '8743', '5999', '7155', '3825', '2241', '9957']
[A]: 68823


[Q]: ['i', 'C', '5373', '2017', 'm', '5435', 'Y', 'h']
[A]: 12825


[Q]: ['g', 'k', 'P', 'S', '1299', '6185', 'f', 'k', 's', '4735', 'v']
[A]:
12219