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: ['3013', '3955', 'f', '1183', '5111', '9509', '2351', '7087', 'f']

Answer: 32209


Question: ['W', '3561', '4631', '8379', 'W', '6857', '2723', '5393', 'h', 'g', 't', 'I', 'R', '2321', 'l']

Answer: 33865


Question: ['7423', '9571', 'L', 'R', '5927', 'x', '7901', '235', '3069', 'H', '2613', 'i', 'J', '1973', '6865']

Answer:
45577