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]: ['D', 'P', 'y', '4891', '1539', 'J', '5737']
[A]: 12167


[Q]: ['8683', 'p', '47', '8983', 'g', 'u']
[A]: 17713


[Q]: ['7997', 'u', 'V', '2905', 'h', 'O', '8993', '6347', 'x', '6157', '9067', '8801', '8417', '5259', 'J', 'N', '1815', 'o']
[A]:
65758