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]: ['A', '9775', '5867', 'n', '1329', '5973']
[A]: 22944


[Q]: ['5573', '6221', 'C', '8649', '6603', 'q', '9403']
[A]: 36449


[Q]: ['D', 's', 'G', '1111', '4581', '4641', '761', '2077', 'F']
[A]:
13171