Confuser Interface

I don't own a car since apart from the odd hiccup here and there public transport's pretty good in London, and it saves spending money on petrol and parking. The odd time I get a cab is offset by not paying for road tax, insurance, MOTs and repairs.

There is one down-side though, and that's trying to use the Prepay Ticket Machine at Greenhithe train station to get a ticket to Bluewater Shopping Centre. I'm totally bewildered by it every time I go there, so here's a little challenge for you...

You've just got off the train at Greenhithe station and you can see the bus for Bluewater pulling off the roundabout on its approach to the station. You've got about 30 seconds to use the machine below to buy a ticket. What buttons do you press, and in what order? Bonus points for buying the cheapest valid ticket for getting there.

Click the image for a bigger version if you can't read it, and if it's not obvious, I added the letters to the image myself - they're not there in real life.

Good luck - you'll need it.