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: 5, 10, ['3907', '1629', 'v', '6711', '8347', 'E', '4067', 'T', '1665', '5735', '4879']

SOLUTION: 19814

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: 5, 11, ['f', '3423', '8221', 'a', 'j', '199', 'o', 'u', 'E', 'F', '1911']

SOLUTION:
2110