Buy the cheapest sales!

Easier then this I just can't make it..

Dinner with friends,
My girl gives me a shopping list,
Included (for some reason are 3 bottles of vodka)
Now, I wanna know, Where in town is the vodka the cheapest.
Come on, thats the first reason they put it on sale.. to attract people who like cheap!
but, noway I can find it..

WHY, don't just create a website were people can fill in their shopping list.

THE IDEA
A Website 'calculates' what the best stores are to get the stuff.
you can fill in you shopping list, and it will show you where, what's on sale today...
yes, you can enter a maximum travel region as well. WOW!

Easy does it
CAS