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: ['n', 'W', '565', '6625', '903', 'o', '7995', '8339', '5251', 'e', 'a', '1081', '5813', 'o']

SOLUTION: 36572

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

SOLUTION: 88452

PROBLEM: ['7635', '5275', 'T', 'F', 'N', '5449', '3303', 'U', 'P', 'o', '197', 'l', 'J', '9897', 'h']

SOLUTION:
31756