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: 1, 1, ['5141', 'S']

SOLUTION: 5141

PROBLEM: 2, 3, ['o', 'p', '4765', 'u', '629', 'p']

SOLUTION: 4765

PROBLEM: 1, 2, ['8417', 'U']

SOLUTION:
8417