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: 2, 20, ['7991', '1029', 'L', '3307', 'A', '6641', '8833', 'J', '2751', '7457', 'f', '943', 'D', '5609', '5123', '5561', 'N', '1755', '1117', 'C', 'k', '6657', '2569']

SOLUTION: 50126

PROBLEM: 4, 14, ['99', 'F', '1297', '7085', 'u', 'w', 'w', '3803', 'F', 'D', 'F', 'L', '5967', '3545', 'E']

SOLUTION: 20400

PROBLEM: 4, 4, ['l', 'b', '559', 'D', 'C', 'V']

SOLUTION:
0