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: 1, 14, ['T', 'y', 'L', 'l', '5307', 'j', '2235', '9617', 'e', '7687', 't', '4357', '1745', 'X', '8485', 'a', '1387', '1351', '6437', 'u']

SOLUTION: 30948

PROBLEM: 10, 15, ['n', '4807', 'a', 'Q', '3781', 'h', '1553', 'n', 'J', 'L', 'M', '3781', '6375', '2429', 'O', '1687', 'L', 'S', '607', '9433']

SOLUTION: 12585

PROBLEM: 4, 27, ['f', '4937', 'x', '7617', '457', 'L', '9187', 'D', '9829', '9643', '7229', '5119', 'b', '4371', '5773', 'U', '6339', 't', 'H', 'W', '3131', '5183', 'w', 'b', '1203', '7761', '1227', '1659']

SOLUTION:
84069