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]: ['2417', '6671']
[A]: 9088


[Q]: ['8591', 'J', 'l', 'l', '7023', 'N', 'n']
[A]: 15614


[Q]: ['O', 's']
[A]:
0