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: ['7459', '491', '7823', '6965', 'H', '109', 'R', 't', '3959', '2821', 'R', '2807', 'o', 'v', '1305', 'a', '1411', 'r', '3669']

Answer: 38819


Question: ['5199', 'h', 'T', 'T', 'l', '1661', 'p']

Answer: 6860


Question: ['5465', 'd', 'l', 'z', 'N', '2005', '9103', 'E', 'U', '9607', '8395', '6283', 'w', 'D', '3903', '1175', '9083', '9351']

Answer:
64370