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]: ['57', '9977', '2657', 'p', '9573', '7745', '4755', 'U']
[A]: 34764


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


[Q]: ['655', 'm']
[A]:
655