Price Calculation app for iPhone and iPad

That from which quantity is different with goods which were alike when it went shopping.
For example, although a bottled beer (633 ml) price differs from "canned beer (500 ml), which [ cheap ] has not it thought the thing " with?
In this application, it can compare briefly only by inputting the prices of goods, capacity, and quantity to measure.
Since quality is also related to an article, of course, it cannot compare simply only in value, but please use [ the time of liking to buy as cheap a thing as possible, and ] it to compare that from which capacity is different with the same goods.
A thing to compare if usage is applied can be compared anything.
Even the price of the price of USB memories and a parking lot can be compared.
It can calculate now including reduction with a point, or the discount rate in cash.
Please specify the numerical value at percentage (%).

Price: Please input the price of articles.
Capacity: Please input the capacity (ml, g, time, etc.) of an article.
Quantity: Please input the quantity (if it is a 6-tin pack 6) of an article.
(In the case of 1, the quantity can omit)
Return(%): Please input the return rate and the rate of a cash discount in a point.
(It is calculable even if he has no input)

If a calculation button is pushed, a result will appear.

Although it is to two that it can compare simultaneously, since only result of one of the two can be deleted, without limit can be compared.

In calculation including return(%), neither omission nor fine calculation to tax omission and a display including tax can be performed.
Please understand that it may differ from the actual amount of return.