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]: ['6165', 'x', 'u', 'n', 'V', 'B', '4039', 'l', '991', 'x', '335', '9011', 'K', '8725', 'a', '6291', 'j']
[A]: 35557


[Q]: ['3351', '6445', 'Y', '8455', 'V', 'z', 'a', 'V', 'S', '8551', '4101', 'q', '8743', '5999', '7155', '3825', '2241', '9957']
[A]: 68823


[Q]: ['s', '9097', 'E', 'u', '2633', 'a', 'k', '5445', 'W', '5347', 'J', 'H', '2139', 'J', 'm', '4829', 'Z', '1391']
[A]:
30881