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: ['6011', 'G', '9043', '8009', 'e', '9493', 'G', '7969', 'M', 'n', 'p', 'g', '7925', 'H', '3213', '8095', '97', 'F']

SOLUTION: 59855

PROBLEM: ['m', 'e', 'W', 'N', '4459', '693', '3765', '2641']

SOLUTION: 11558

PROBLEM: ['1317', '9695', '2587']

SOLUTION:
13599