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: ['7361', '6913', '3605', '2081', '7619']

Answer: 27579


Question: ['m', 'g', '7251', '5873', '59', '7345']

Answer: 20528


Question: ['S', '4607', '6265', '355', 'R', '6173', '6323', 'E']

Answer:
23723