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]: ['9125', '1443', '2303', 'O', '8463', '401', '3983', 'g', '4327', 'z', 'n', 'F', 'Q', 'j', '9885']
[EX A]: 39930

[EX Q]: ['X', 'u', 'B', '269', '9089', 'M', '5175', 'K']
[EX A]: 14533

[EX Q]: ['s', '3779', '5301', '1223', '4339', 'M']
[EX A]:
14642