Hi, I'm new to this and am currently developing my courier website. For a while now, I've been looking for a code which allows potential customers to find a quick quote. They would insert the postcode from where they want the item collected and the postcode to where they want the item delivered. The two postcodes would then generate an estimated price based on the distance between the postcodes. I believe this has to work with Google maps?

We have several sized vehicles for use so depending on which vehicle the customer has opted for, the quote would be based on that vehicle. Each vehicle has their own set rate.

There's a perfect example of this: http://www.onceoffdeliveries.ie/

I'm using WordPress to develop my website. I would be grateful if anyone could help.