Hi Zeners
Could you help me config the Zent cart for book store shop with following scenarios

Each product ( book ) have 3 options to sale:
1- Get "New" book with original price
2- Get "Photocopied" book with the price is calculated by 10% percent of original price plus XX$ ( base on total pages- XX value will manual input)
3- Borrow book - price is the same with option 1 , I will return money when user send book back

And below this we have some options value for case 3 ( borrow book ) just display only , user can click on these but it not effect price , examle
- Borrow in 1 month
- Borrow in 2 month
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And the last I want checkbox option " Need receipt ?" or not , if user choose Yes, the price will add 5% to order ( base on user choose get new book or photocopied book )

Thanks in advance