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]: ['4389', '8535', 'D', '6063', 'z', 'r', 'w', '5725', '291', 'a', '9059', '569', '2943', 'W']
[A]: 37574


[Q]: ['6051', '5303', '1509', '2797', 'Z', '4777', '721', '8563', 'K', '63', '9115', 'd', '7305', '9743', '7409']
[A]: 63356


[Q]: ['w', 'b', '5473', '1865', 'j', 'F', '6133', 'r', 'W', '6207', '3199', '7751']
[A]:
30628