Hi!
We're looking for an e-commerce solution based on Joomla. Since HikaShop is well know in the last years, I would give it a try. But there are two things I'm not sure about.
#1 Bottle deposit
I want to create an online shop for a "Drinks Market". This market is based in Germany. Here you have to handle with "bottle deposit". This is an additional price per product, that have to be displayed on the product listings, product details page, shopping cart, order mail and invoice.
As far as I know, HikaShop does not offer such an extension.
But maybe it can be realized with HikaShop. Would it be possible to use custom fields (for products) for deposit values? These deposit values have to be displayed _and_ calculated as SUMMARIZED deposit value in the shopping cart (and order mail, invoice).
One example:
Let's say, we have two products in the shopping cart...
product price 1 = 10,00 €
deposit price 1 = 3,00 €
product price 2 = 5,00 €
deposit price 2 = 1,00 €
The shopping cart shows the product prices (single and summarized, as per default) and adds another line "deposit", that shows the sum of all deposit prices (in the example: 4,00 €). So the final result is the summarized price of 19,00 €.
#2 Base price information
Here in germany exists a regulation for price information ("Preisangabenverordnung" -> "Price Indication Ordinance" or "base price").
It means, that if we sell packages or goods by weight/volume/quantitiy/bulk we have to display the base price per unit.
One example:
A product - let's say a water bottle - contains 0,5 l. The price is 0,90 €. On the product listing page and the product details page the following has to be displayed:
Price: 0,90 € (as usually)
Content: 0,5 Litre (1,80 € / 1 Litre)
Now I try to describe the need..
For the configuration (in the backend) I would need two fields:
[UNIT_VALUE] - in my example "0,5"
[UNIT_BASE_VALUE] - in my example "1"
Now we need a little calculation for the base price per unit: [BASE_PRICE] = [ARTICLE_PRICE] / [UNIT_VALUE]
Now we need to display the result in the frontend - on following pages: ARTICLE_LISTINGS and ARTICLE_DETAIL_PAGE - like this:
Content: [UNIT_VALUE] [UNIT] ([BASE_PRICE] € / [UNIT_BASE_VALUE] [UNIT])
... and now with values:
Content: 0.5 Litre (1,80 € * / 1 Liter)
In the frontend: This information has to be displayed directly near the price information (in the html code: mainly directly after the price - with it's own css class for styling).
What do you think? Can HikaShop achive these jobs? 
Cheers
Rusty