TASK DEFINITION: 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.
PROBLEM: ['Q', 'v', 't', '223', 'm', 'l', 'c', 'M', 'b', '2227', 'P', 'e', 'n', 'f', 'S', '2205', '3517', '5545']

SOLUTION: 13717

PROBLEM: ['1165', '8341', '9685', '6749', '8571', 'p', '9355', '5319', '9587', 'B', '9581', '1719', 'Q', '577', '8883', 'S', '7851', '1069', 'i', 'y']

SOLUTION: 88452

PROBLEM: ['B', 'F', '863', 'V', 'W', '3489', 'p', 'S', '7531', 'X', '3031', '9479', '2823', '9137', 'w', '3517']

SOLUTION:
39870