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', 'V', 't', 'X', 't', 'M']

Answer: 0


Question: ['t', 'G', '217', 'W', 'l', 'j', 'd', 'U', '6795', '1609', 'n', '6919', '617', '5753']

Answer: 21910


Question: ['d', 'c', '967', 'p', '8913', 'h', '4843', 'y', '2875', '1927', 'J', 'b', 'n', '9549', 'A', '4499', '5401', 'R']

Answer:
38974