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: ['r', 'B', '8791', '3165', 'n', 'm']

Answer: 11956


Question: ['o', 'J', 'B', '7765', '7781', '5513', '8721', 'u', '9557', 'C', 'A', '1281', '6565', 'H', '5559', '1695', '7577']

Answer: 62014


Question: ['e', '7511', 'm', 'u', '2601', '9039', 'X', '6417', '3045', '443', '6603', '3335', 'd', 'E', 'r']

Answer:
38994