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: 16, 20, ['8615', '8269', 'k', 'R', 'l', '9823', '6879', '7777', 'w', '8443', 'W', '6951', 'Q', '8251', 'M', 'g', 'F', 'w', 'C', '7267', 's', '973', '4703', '8921']

SOLUTION: 7267

PROBLEM: 3, 5, ['6621', 'A', '3201', '9737', '7957', 'v', 'x', 'q', 'b', 'X', 'v', 'B', 'h', '3985', 'M', '3037', 'V']

SOLUTION: 20895

PROBLEM: 1, 18, ['1137', '7521', '1291', 'o', '391', '5329', 'X', '391', 'i', '6893', '8547', '9361', 'Z', 'O', '9701', '4097', '9273', '3877', '1589', '9097']

SOLUTION:
67809