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, 12, ['m', 'f', 'y', '2363', '9555', 'E', 'm', 'J', '1977', 'z', '3733', '9745', 'm', 'u', '1033', 'x', '7351', 'O', 'W', '8311', '955', '8643', 'D', 'e', 'z', 'M', '5139', 'o', 'a']

SOLUTION: 27373

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

SOLUTION: 20895

PROBLEM: 3, 7, ['8835', 'x', 'r', '1569', 'I', '8693', 'o', 'P']

SOLUTION:
10262