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]: ['j', '6731', 'h', 'G', 'F', '6899', '4317', 'm', '9491', 'l', '971']
[A]: 28409


[Q]: ['q', 'N', 'y', '7859', 'u', '2861', '4151', 'Q', 'x']
[A]: 14871


[Q]: ['p', 'L', 'Z', '4167', 'I', '7149', '4413', 'U', '9941', '169', '2425', 'J', '897', 'x', '5169', '7445', '417', 'Y', '4255']
[A]:
46447