The Great Big SYP Ibiza Tuna Quiz

Well, are you smarter than a ten year old? Here's the knotty problem I was faced with at SYP today which concerns economies of scale, bulk buying and super fast mental arithmetic.

I needed some tinned tuna for use in tuna, sweetcorn and mayo sandwiches. The two options placed tantalisingly on the shelf were

Buy a pack of 3 tins for €1.16

or

Buy a pack of 6 tins for €2.47

What would you do?