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: 3, 22, ['k', '427', 'x', '9695', 'a', '2243', '329', 'F', 'n', '6253', '4873', 'f', 'z', 'R', 'b', '4351', 'b', 'i', 'g', '6937', 'I', 'k', 'f']

SOLUTION: 34681

PROBLEM: 7, 8, ['R', 'r', '6533', '3469', '3973', '1915', 'p', 't', 'a']

SOLUTION: 0

PROBLEM: 3, 9, ['4943', '547', '8511', '6113', 'D', '5115', 'B', 'Z', 'O']

SOLUTION:
19739