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: ['N', 'e', '4283', '3243', '5581', '1407', 'q', 'y', '6685', 'v', 'c', '5995']

Answer: 27194


Question: ['O', 'K', 's', 'V', '6815', 'c', '9277', 'V', '1783', 'b', 'i', '2045', 'E', 'E', '2035']

Answer: 21955


Question: ['6035', '7773', 'l', '8399', '3453', 'z', 'N', '1693', '8833', 'c', 'P', 'V', '9869', '8459', 'f']

Answer:
54514