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: ['457', '173', '6807', 'o', '555', 'l', 's', 'Z', 'm', '3035', '1283', '5645', 'S', '8641', 'J', 'Z', 'z', 'K']

Answer: 26596


Question: ['8821', '7221']

Answer: 16042


Question: ['E', '7641', 'F', 'M', 'r', 'S', '7949', '9417', '1921']

Answer:
26928