Question 1130025

First Store:

customer must buy increments of 6 boxes.
{{{(21/6)(dollars/box)}}}




Second Store:
The cost for the milk must be included but the emphasis is on the boxes of cookies;
 
customer must buy increments of 5 boxes.
{{{((15+2)/5)(dollars/box)}}}

{{{(17/5)(dollars/box)}}}



17*6 boxes at first store should match the cost of 21*5 boxes at second store.
That is, 102 boxes at the first store should be same cost as 105 boxes at the second store.