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: ['6563', 'R', 'M', 'B', 'b', 'E', '9911', '7327', 'J', '7389', 'w', 'b', 'c', '1527', 'K', 'r', '5441', '6823', '8455']

Answer: 53436


Question: ['H', 'i', '8085', 'E', 'q']

Answer: 8085


Question: ['Y', 'z', '7561', 'z', 'v', '6459', '6807', '8865', 'C', '1453', '6029', '7845']

Answer:
45019