I need to create an estimator form for a website i have designed. It needs to give various options on items through out the form whilst making a calculation to sub total as items are chosen. Also it needs to allow customers to enter a postcode, where the website will be able to work out how far the mileage is and to add to total cost if over a certain mileage. ( if that all makes sense!)
Can anyone advise me on this?
I'm not sure 100% of the calucations you are making, but if you look at the code of the following examples it should give you a good starting point: