Price article based on text input

Price article based on text input

I would like to use joomshopping for selling classified ads in a local newspaper, but I need some help to find out how to do this.

I found to commercial addons that could be the solution.
I need people to be able to enter text in input fields. The more input fields they use, the higher the price.
The commercial extension I am looking at is:
Free attribute text price - http://www.webdesigner-profi.de/joomla-webdesign/shop/addons/free-attribute-text-price.html?lang=en

Can someone explain to me or confirm to me that the following scenario is possible?
Costs-scenario. The first 3 input fields cost € 5,-. Every next input field cost €2,-
* If a customer fills 3 input fields he pays €5,-
* If a customer fills 2 input fields he pays €5,- (minimum of €5,-)
* If a customer fills 5 input fields he pays €9,- (€5,- for first 3 input fields and (2x)€2,- for next input field).

Is this possible with the extension Free attribute text price?

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Aw: Price article based on text input

No.

Addon support "Price per symbol" or "Price per word"

Aw: Price article based on text input

Is there another addonn that can help me solve my problem?

Or do you any (paid) custom work so I can get an addon to my needs?

Aw: Price article based on text input

Not fully understand what it means 2,5 fields

Aw: Price article based on text input

A product has 10 inputfields.
For the first 3 fields they pay 5 euros, this is the minimum amount a customer needs to pay(if he fills in 1 field or 2.5 fields, he stil pays 5 euros).
For the 4th to the 10th field the customer pays 2euros per field.

So no payment per character or word, but they pay for every field the customer puts text in.

Aw: Price article based on text input

For ordering http://www.webdesigner-profi.de/kontaktformular.html