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]: ['3469', 'n', '5561', '8597', '921', '4737', 'r', 'P', '7127', '3651', 'D', '1703', 'y']
[A]: 35766


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


[Q]: ['f', 'A', '7965', '4041', '5253', 'T', 'W', 'n', 'l']
[A]:
17259