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: 6, 15, ['H', 'u', 'Y', 'Z', 'm', '1897', 'u', '2511', '507', '4977', '2019', '8913', 'Q', '5835', '1787', 'q', '1197']

SOLUTION: 28446

PROBLEM: 5, 12, ['1699', '6521', '1705', '8871', 'C', '8963', '8657', 'E', '2693', 'e', 'S', 'a', 'M', '289', '6037', '2663', 'w', 'e', 'X', '2973', 'j', 'f', '1609', '2759', 'P', 'l', 'k', '4463']

SOLUTION: 20313

PROBLEM: 8, 16, ['293', 'm', '8179', 'd', 'C', '4951', 'J', 'O', '3663', '3991', '5479', '5997', 'Q', 'c', 'b', '5205', 'j', '5133', 'X', 'S', '8221', 'K']

SOLUTION:
24335