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]: ['c', '7415', '6253', '4477', 't', '9449', '7733', '2325', 'Z', '5413', 'q', 'm', 'R', '8619', '7289', '857', '7273', '7425']
[A]: 74528


[Q]: ['z', 'c', 'E', 'Q', '1839', 'g', 'X', 'c', '291', 'c', 'w', 'e', '5957', 'X', '6471', 'A', '8359', 'y', '3611', '5417']
[A]: 31945


[Q]: ['3123', '6669', 'A', '3747', '3195', '8907', 'O', '2081', '8973', '9143', '7511', 'P', 'Y', 'Z', 'Q', 'b', 'h']
[A]:
53349