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]: ['95', '279', 'y', 'p', '5083', 'X', 'E', '3817']
[A]: 9274


[Q]: ['D', '8591', 'b', 'n', 'e', '883', '8923', '245', 'z', '5643', 'C', '2911', '9275', '711', '7299', '3449', '4799', '6065']
[A]: 58794


[Q]: ['u', '5021', '8771', 'G', 'K']
[A]:
13792