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: 21, 24, ['6903', '3349', '4585', 'C', 'w', 'I', 'U', 'n', '2689', 'W', '6601', '7357', '5063', 'y', '5779', 'L', '4257', 'd', '653', 'k', '8349', 'r', 'Y', '3019', 'E', '797', 'm']

SOLUTION: 11368

PROBLEM: 11, 14, ['H', '4643', 'k', '9583', 'K', '3497', 'Q', '8111', '1837', 'Z', '6885', 'L', '1759', '7777', '3137']

SOLUTION: 16421

PROBLEM: 4, 11, ['4945', '3663', 'l', 'r', '3803', '8211', '6299', 'F', '8221', '7743', '1455', 'M', '9909', 'V', 'n']

SOLUTION:
35732