Product Page Option Prices

Hello everybody,

I was trying to find a way to include 2 different sizes for a Product in the Product page. I can put different options for a product (Like 5 kg and 17 kg versions), but I don't want the 17 kg one to have a (+120$) price increase. Instead, I wonder if it's possible to show the total price of the option (Let's say 17 kg costs 200$), instead of adding up to a base amount.

Basicly I want the Product page to be something like this:

Product A (5 kg)

Price: 80$

Options:

5 kg (80$)
17 kg (200$)

When customer clicks the 17 kg option, site either has to update product name to "Product A (17 kg)" and price to 200$, or it can direct to the page "Product A (17 kg)".

Is it possible on default or with any extensions?

Have a nice day =)

I need this function as well. By chance have you found a solution?

To clarify, I'd like the options to be the actual price of the version of the product rather than be shown as added or substracted price from the base price.

For instance
Perfume #10
The default product is 100ml and is priced at $50.00

Available Options - Size
100ml $50.00
200ml $100.00
400ml $225.00

In the back end the prices for each option size could be still the variants (+ or - from the base). The change would be to show it as the total price for the option rather than the over ride price.

I mention this because on some screens the people might not see the + sign and think the price beside the option is what they're paying.

Cheers