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- we have a rsform (ordering form) devided into several pages.
- it has some checkbox items (each item has a price)
- we need an intern calculator on this form that add all prices of the selected items and show it live on the screen (price and tax)
- the form also contains an input of a zip-code (5 digits)
here we need an other calculation to get the shipping price
there is a table of shipping prices based on the first 2-3 digits of the zip-code
- at the end of the form we need to show the price of the selected options + shipping (price / tax)