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.
--------
Question: ['4389', '8535', 'D', '6063', 'z', 'r', 'w', '5725', '291', 'a', '9059', '569', '2943', 'W']

Answer: 37574


Question: ['2775', '7405', 'F', 'D', '9025', '827', 'e', 'j', 's', 'e', 'Q', '1137', 'G']

Answer: 21169


Question: ['5671', '5475', 'Q', '8567', '4017', 'W', '3607', 'Z', '6167', 'r', '8987', '3619', 'K', 'i']

Answer:
46110