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


[Q]: ['187', 'J', 'l', 'p', '1009', 'g', '5817', 'V', 'B', 'Z', '3329', '9253']
[A]: 19595


[Q]: ['Q', '2133']
[A]:
2133