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]: ['Y', 'X']
[A]: 0


[Q]: ['H', 'i', '8085', 'E', 'q']
[A]: 8085


[Q]: ['4767', '6901', '6299', '3859', '865', 'R', '7519', '3087']
[A]:
33297