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]: ['l', 'V']
[A]: 0


[Q]: ['8609', '8045', '2517', '3821', 'x', '3895', 't']
[A]: 26887


[Q]: ['t', 'p', '3069', '9753', 'j', 'N', '327', 'q', '5101', 'm', '3031', 'a']
[A]:
21281