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: 21, 27, ['2789', '3875', '2351', 'Y', '1127', 'J', 'Z', '5187', 'c', '8115', '3459', 'Y', 'f', 'o', 'L', 'H', '2931', '879', 'L', 'e', '3745', '173', 'v', 'W', '9393', 'Y', '7651']

SOLUTION: 20962

PROBLEM: 6, 15, ['H', 'u', 'Y', 'Z', 'm', '1897', 'u', '2511', '507', '4977', '2019', '8913', 'Q', '5835', '1787', 'q', '1197']

SOLUTION: 28446

PROBLEM: 2, 8, ['8209', 't', 'r', 'r', 'B', 'L', 'b', 'D', 'd']

SOLUTION:
0