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: 11, 20, ['8031', 'v', 'p', '4015', 'v', '3299', '4143', '445', 'I', 'L', 'm', 'u', '7963', '8085', 'c', 'k', 'I', 'A', '8433', '1897', 'g', 'x', '5935', '5195', 'W', 'j', 'A']

SOLUTION: 26378

PROBLEM: 16, 17, ['5985', '1925', 'r', 'H', 'p', 'L', '5019', 'y', 'O', '6575', '9729', 'S', '2497', '43', 'u', '317', 'p', '3043', '3247', 'z', 'O', '8379', '7715', '8399']

SOLUTION: 317

PROBLEM: 2, 7, ['j', 'p', 'p', 'C', '667', '9201', 'z', '7343', '8059', '9353', '9649', '3481', '1505', '611', 'b', 's', '7539', '3545', '1965', '2457']

SOLUTION:
9868