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: 5, 10, ['8553', '4157', 'm', 'Q', 'u', 'j', 'X', 'r', '8579', '255', 'A', 'g', '7017', '5707', 'd', 'O', 'V', 's', 'p', '337', 'F', '5439', '5715', 'c', '2615', 'l', '3537']

SOLUTION: 8834

PROBLEM: 11, 16, ['3157', '9479', 'p', '551', '7723', 'I', 'E', 'L', '3983', 'J', '2037', 'q', '4041', 'U', 'n', 's']

SOLUTION: 6078

PROBLEM: 2, 5, ['1523', 'H', '959', '519', 'F', 'C', '227']

SOLUTION:
1478