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]: ['y', 'F', '135', '7359', '8579', '6809', '3979', 'H', 'm', '5059', '373', 'Y']
[EX A]: 32293

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

[EX Q]: ['9087', 'l', '3439', '8889', '8975', '4751', '7047', 'b', 'W', 'R', '8935', 'u', '8569', '2833', '5999', 'o', 'H']
[EX A]:
68524