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, 3, ['x', '971', '3029']

SOLUTION: 4000

PROBLEM: 1, 2, ['4319', '3495']

SOLUTION: 7814

PROBLEM: 19, 26, ['Y', '5571', 'A', 'F', 'n', '9311', '9543', 'C', '6811', 'w', 'h', 'G', '1645', '2603', '4101', '3861', '9279', '4127', 'k', '9341', 'R', 'x', '1045', 'L', '4663', 'F']

SOLUTION:
15049