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


[Q]: ['v', '3135', 'J', 'm', 'a']
[A]: 3135


[Q]: ['7807', '4467', 'O', '3199', '6071', '9687']
[A]:
31231