How much would the "12 Days of Christmas" cost?

There are notes/tips included on the first page. Basically, though, it's a twist on what quite a few teachers have done in the past. As well as working out how many gifts you would buy if you were to follow the song/carol, I have provided prices from 4 retailers. Pupils have to choose whichever they think will be the cheapest, estimate the cost then go forth and calculate.