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]: ['v', 't', 'a', 'r', 'O', 'I']
[A]: 0


[Q]: ['y', 'R', 'b', 'v', 'm', 'H', '9903', '8689', 'D', '1023', 'a', '233', '1833', 'o', 'n', 'm', '5531']
[A]: 27212


[Q]: ['7007', '8631', 'N', '167', 'J', '5075']
[A]:
20880