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


[Q]: ['6121', 'S', '8683', 'Y', '6107', 'B', '6193', '5555', '365', '945', '1439', '7257', 'g']
[A]: 42665


[Q]: ['8117', 'n', 'Z', 'e', 'c', '3621', '2421', 'j', '1091', '9315', '8621', '3795', '7601', '2751', '6733']
[A]:
54066