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]: ['7959', '1345', '4605', '6453', 'Q']
[A]: 20362


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


[Q]: ['7887', '6353', '9489', 'j', 'c', '3645', '5827', 'X', 'f', '1965', '6701', 'D']
[A]:
41867