How?

I would like to know how a farmer in Costa Rica grows extra large pineapples, they are harvested and transported to Scotland and delivered to Tesco where they're sold for 49p. Is it sheer volume? Even so, it seem ridiculously cheap.

Another roasting day here in Oban - I've just come back from 'Green Shoots' where I've been watering my vegetable beds, but water is getting very short.