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]: ['D', '1693', 'f', 'B', 'o', '3947', '8667', 'f', '6721', '4191', '79']
[A]: 25298


[Q]: ['597', 'i', 'd', '3201', 'u', '1111', '8563', 'c', 'E', '5983', '6293']
[A]: 25748


[Q]: ['x', '933', '8599', 'h', '901', 'u', 'Z']
[A]:
10433