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]: ['m', '3481']
[A]: 3481


[Q]: ['1903', 'Z', '3515', 'z', 'P', '475', '3025', '3819', 'G', 'v', 'j', '9619', '4965', 'g', '4611']
[A]:
31932