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: 11, 15, ['W', '8193', '2581', 'f', 'j', '5727', 'A', '6177', 'u', '4201', 'T', 'w', 'C', 'u', '7973', 'd', 'c']

SOLUTION: 7973

PROBLEM: 3, 4, ['I', '8765', 'a', '719', '2555', 'w', '3437', '6159', 'e', '5239']

SOLUTION: 719

PROBLEM: 7, 16, ['9723', '6267', '5227', '2961', '817', 'm', '5309', '7225', 'v', '7027', '3265', '9205', '5047', 'C', '6223', '6379', 'S', 'l', '3119', 'v', '5365', 'l']

SOLUTION:
49680