How to setup an specific price on products?

Hello to all the staff, 

are again myself. 

I would like to create a form like this: 

http://www.buydifferent.it/vendilo_a_buydifferent.html

where for each feature can enter a specific price, 

is it possible?, 

Can you show me how to do the math please? 

thanks

You can integrate a payment form with a different price for each product. While on the payment wizard:

1. Select the product/item. Click on Add New Option

2. Select Add a Custom Property option. Click on Next button

3. Start adding the product/item custom property options

a. Add Name to the custom option

b. Add the Options lists

c. Check Special Pricing option to allow custom price for each custom property

d. Click Next button to continue

4. Complete the Custom Property option.

a. provide the Price for each available option in the lists.

b. You can check Show sub-total on form, if you want.

5. Click Finish button to complete Custom Property option for the product/item.

6. Click Save Product button to save the product/item custom property option.

You can decide whether a product will be required and/or selected by default.

If more help is needed, please describe in details the desired results and will happily assist you.