Thirteen boxes are arranged in two stacks (Stack 1 to the west of Stack 2), each with seven shelves (one shelf vacant). Each shelf holds one box. Vari...
Question
Thirteen boxes are arranged in two stacks (Stack 1 to the west of Stack 2), each with seven shelves (one shelf vacant). Each shelf holds one box. Various conditions about the relative positions of boxes labeled with letters and numbers are given. Based on these conditions, find the sum of the numbers printed on Box Y and Box L.