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: ['9869', '7701', 'H', 'o', 'v', '1431', 'O', 'L']

Answer: 19001


Question: ['e', '9777', '1835', 'N', '2425', '1427', 'o', '4459', '9961', '3285', '5199', 'x', 'e', '7727']

Answer: 46095


Question: ['P', 'j', 'X', '6923', 'N', '7941', '7201', 'a', '8241', 'A', 'A', '3331', 'i', 'V', '3011', '5173']

Answer:
41821