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: 10, 27, ['Y', 'Q', 'o', '9581', '2725', 'd', '8857', '1477', '2451', '8595', 'I', 'I', '4883', '3781', 'E', '9539', 'k', '1245', '6741', '2051', 'l', '5245', 'e', '6949', '4361', 'U', 'I', 'J', '7867', '991']

SOLUTION: 53390

PROBLEM: 3, 16, ['1661', '2609', '7987', '619', '6765', '5249', '1377', '8971', 'J', 'o', '4803', 'O', '699', '4415', 'V', '1813', 'j', 'm', 'L']

SOLUTION: 42698

PROBLEM: 2, 5, ['8263', '4831', '4835', 'C', '4681', '7449']

SOLUTION:
14347