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, 10, ['H', 'P', '1985', '1797', '9115', 'V', 'o', '2405', '7817', 't', 'C']

SOLUTION: 23119

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

SOLUTION: 6078

PROBLEM: 5, 15, ['3395', '3363', 'N', '2599', 'A', '5421', 't', '741', '3721', '4929', 'W', 'T', 'j', 'L', 'y']

SOLUTION:
14812