It is a computer useful by the sale. Three patterns can be calculated.
[Discount calculation] ･Two discounts of 500 dollars? ･50 dollar off of 300 dollars?
[The same weight] The amount of money when making it to the same weight is calculated, and it is possible to compare it. ･Which is cheap when it is a commodity of 150 dollars for 100g, a commodity of 200 dollars for 150g, and the same 100g?
[Point] ･How many points can you obtain if it buys for 100 dollars, and the point is reduced by 10%?