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: 3, 16, ['T', 'v', '2985', 'F', '8921', 'M', 'F', '4243', 'k', 'x', '435', 'B', '3335', '7613', 'M', '7809', 'q', '4147', 'h', '7523', 'R', '7589', '8795', 'O', 'L', '3371']

SOLUTION: 35341

PROBLEM: 5, 21, ['f', 'c', 'y', '1711', '3261', 'I', '3249', 'O', '7875', 'm', '7665', '375', 'V', '4561', 'v', 'J', '2809', '2081', 'i', 'v', 'S', 'f', '8393', 'P', 'r', '4103', 'q', '1141', '9971', '671']

SOLUTION: 31876

PROBLEM: 3, 7, ['H', 'E', '1101', 'H', '1243', '9399', '9879', 'i', 'E', '9699', '6827', '239', '6007', '2297', 'o', 'z', '5399', '5917', '2153', '9189', '7473', 'F', '1527', 'K', '4819', '6243', 'V', 'A']

SOLUTION:
21622