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: ['2215', '4369', 'e', '4979', '4069', 'J', 'L', '789', 'w', 'p', '9533', '8523', '2531']

Answer: 37008


Question: ['Z', 'v', 'P', 'm', '1931', 'a', 'C', 'd', '2279', '3345', '7187']

Answer:
14742