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: ['r', 'b', 'G', 'H', '255', '6809', '5133', '1059', '4317', 'P', '7219', 'd', '805', 'G', '5243', '8305', '8509', 'o']

SOLUTION: 47654

PROBLEM: ['95', '279', 'y', 'p', '5083', 'X', 'E', '3817']

SOLUTION: 9274

PROBLEM: ['9447', '8399', '9059', 'q', '7923', '1069', 'Y', 'm', '3909', 'M']

SOLUTION:
39806