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: ['q', '5151', 'R', '441']

Answer: 5592


Question: ['V', '2633', '3269', 'r', 'Q', '3517', '2571', 'G', '4105', 'm', 'z', 'B', 'A']

Answer: 16095


Question: ['9855', '6233', 'A', 'E', '8729', '4495', 'q', 'U', '3347', 'e', '989', 'Y', '7747', 'D', 'd', '157', 'T', 'W']

Answer:
41552