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]: ['8871', '1297', 'W', 'f', 'Y', '8731', '113', '6707', '379', '9631', 'X', 'C', 'q']
[A]: 35729


[Q]: ['9403', '2607', 'G', '7901', 'K', '7967', 'a', 'n', '1967', 'x', 'g', '1081']
[A]: 30926


[Q]: ['8903', 'E', '9711', 'm', '8855', '8203', 'B', 'P', '801', 'E', '2613', 'W', '4415', '3847', '7697', '5603', 'F', 'f', 'B']
[A]:
60648