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.

[EX Q]: ['2895', '8095', 'y', '1927', '4827']
[EX A]: 17744

[EX Q]: ['D', '1693', 'f', 'B', 'o', '3947', '8667', 'f', '6721', '4191', '79']
[EX A]: 25298

[EX Q]: ['8019', '4787']
[EX A]:
12806