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]: ['C', '3133', '2183', '5793', '9305', 'd', 'g', '6501']
[A]: 26915


[Q]: ['D', '8591', 'b', 'n', 'e', '883', '8923', '245', 'z', '5643', 'C', '2911', '9275', '711', '7299', '3449', '4799', '6065']
[A]: 58794


[Q]: ['s', 'u', 'e', 'y', '9683', 'X', '4267', 'Q', 'r', 'd', '3319', 'U']
[A]:
17269