TASK DEFINITION: In this task, you are given inputs i,j, and A, where i and j are integers and A is a list. You need to return the sum of all the numerical elements in the list A between the positions i and j (including positions i and j). Return 0 if no numerical element is present in the list between the given ranges. i and j will be non-negative, and will always have a value less than the length of A. i will always be less than j.
PROBLEM: 3, 4, ['F', '7341', 'P', '3315']

SOLUTION: 3315

PROBLEM: 2, 2, ['4965', '6219']

SOLUTION: 6219

PROBLEM: 6, 9, ['T', '5195', '925', '6137', 'B', '9785', 'W', 'L', '4687', '15']

SOLUTION:
14472