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, 7, ['v', '8881', '2711', '7569', 'C', '6117', '1569', '1257', 'h', '5407']

SOLUTION: 26847

PROBLEM: 8, 9, ['P', 'V', '5567', 'm', 'V', '9533', '2381', '1095', '835', 'B', 'z', 'J', 'H', 't', 'b', 'z', 'e']

SOLUTION: 1930

PROBLEM: 1, 2, ['7235', '5645']

SOLUTION:
12880