Can someone tell me the cost of the Advance Ecommerce store option?

Trying to find the price for the advanced storefront option to no avail. Also trying to find out what features the simple store has. The forum shows they don't have the ability to implement coupons. But is there a way to implement variations per product - like loading your lotion product but offering different scents to choose from instead of having to upload the same product twelve times in order to provide the different scent options? If not, the Storefront would I presume. But what do they charge?

Please advise...