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: ['7361', '6913', '3605', '2081', '7619']

Answer: 27579


Question: ['3051', '5343', 'k', 'k', '6815', 'E', '4745', 'A', 'A', '1251', '6649', 'f', '4133', 'X']

Answer: 31987


Question: ['581', 'n', 'C', 'W', 'E', 'y', '3523', 'j', 'n', '8885', '5389', '4263']

Answer:
22641