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]: ['3215', 'h', '9133', '2771', 'F', 'x', '9033', '709', 'q']
[A]: 24861


[Q]: ['L', 'w', '2783', '6993', 'd', '9173']
[A]: 18949


[Q]: ['M', '7819', 'l', '3409', 'P', '7411']
[A]:
18639