Your browser does not support grid, so will not be supported. Hover over your browser version to see if there is a way to enable potential support. Sorry, I am no longer able to justify working on making the layout work on older devices.
Question 2 (time limit 1 minute): Kourindou has many things for sale, varying from completely useless things, to very useful things. Let's say you were to buy something. If you buy 1, it's 7 yen. If you buy 2, it's 4 yen. Why is that?