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, 9, ['6869', '4103', 'S', 'k', '6745', 'n', 'x', '7657', 'F', 'd', '1953']

SOLUTION: 25374

PROBLEM: 2, 2, ['R', '979', 'H', 'W', 'y']

SOLUTION: 979

PROBLEM: 20, 24, ['V', 'm', 'Z', '5209', '8839', 'K', 'Y', '8429', '2895', '3799', 'x', '7101', 'o', 'X', '2359', '2857', '785', '4605', 'z', '2525', 'y', '4943', 'R', '8405', '6873', 'V']

SOLUTION:
15873