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]: ['m', 'e', 'W', 'N', '4459', '693', '3765', '2641']
[A]: 11558


[Q]: ['S', 'D', '3101', '4967', '8197', '5025', '4257', 'S', 'X', '7641', 'n', '6775', '4719', 'o', '2821', 'x', '5605', '2181']
[A]: 55289


[Q]: ['W', 'U', '5723', '6845', '4455', 'p', 'v', '3905', 'L', 's', '3231', 'v', '4329', 'Z', 'z', '5335', '5815']
[A]:
39638