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: ['g', 'A', 'm', '4005', '8079', 'G']

SOLUTION: 12084

PROBLEM: ['A', '9775', '5867', 'n', '1329', '5973']

SOLUTION: 22944

PROBLEM: ['7545', 'L', 'o', 'W', 'B', 'i', '3087', '1275', '2519', 'B', 'O', '6959', 's', 'j', 'g']

SOLUTION:
21385