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]: ['j', 'A', 'L', 'i', 'I', '3827', '8245', 'H', 'J', '8117', 'w', '4659', 'Y', 'x', 'K']
[EX A]: 24848

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

[EX Q]: ['t', '6573', 'K', 'b', '6409', 'S', '9363', 'R', 'Q', 'z', 'y', '2099', '6365', '5087', '8199', '6799', 'P', '6001', 'P']
[EX A]:
56895