When I saw the goods to say, such as the super, and that's including tax some, somewhat that's tax, why not become a mind things like somewhat that's 100g, that.
Please try to check this app at such time.
If you enter the amount including tax / tax fee will be displayed immediately. If also input grams, you can see also the amount of per 100g. In the case of the number I find the amount of per. Price at the time of the discount is also easily check.
Up to 4 because history can also be seen, it is also useful to price comparison.