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]: ['7277', 'c', '9587', '2613', '853', 'w', 'y', '4067', 'o', 'u', 'j', 'W', '1517', 'x', 'Y']
[EX A]: 25914

[EX Q]: ['D', '1611', 'w', '8825', '8987', '3021', '9019', 's', '87', '9283', '5717', 'f', '1503', '6593', '8533', '785', 'g']
[EX A]: 63964

[EX Q]: ['171', '7101', '3935', 'X', '7451', '1313', '2157', '6021', 'u', 'w', '6285', '7519', '5607', 'V', '3791', 'H', '2769', 'f']
[EX A]:
54120