Which is inexpensive $298 for 150 pieces or $498 for 270 pieces? Can you calculate them quickly? This application is 'Unit price calculator' for such a kind of situation.
You can compare the two unit prices easily and quickly by using this application. This application has following 3 input fields:
- Price
- Quantity
- Extra charge

If you input 'Price' 'Quantity' you can get 'Unit price' automatically. If you have to pay extra charge (shipping fee and so on) input it to 'Extra charge' field.

To switch the focus to other input-field touch the field.
DEL key deletes last inputted character. C key clears a focused field. AC key clears all fields of a focused item.