You can buy loose tomatoes for 2.75 zeds/kg, or by the box for 22 zeds/10kg. Which is the better deal?
It is 2.75 zeds/kg for loose tomatoes but only 2.2 zeds/kg for boxed tomatoes; because 10kg of loose tomatoes would cost 27.50 zeds; you get more tomato for each zed you spend when buying the box.
Using an everyday context, shopping for groceries, this item addresses the basic concept of value for money, according to the testers. To gain credit for this item, students have to show they have compared the two ways of buying tomatoes using a common point of comparison.