Shopping at night

After work today I went to the 24-hour open gas-station to get some food and also some toiletpaper. The 8 rolls of TP had a price of $8,50 and here`s the following conversation:
ME: -Ka i helsikke? (nice version of what the...)
Cashier: - Paper is expensive!
ME: -Not that expensive
Cashier: -We`re saving the rain forest!
ME: Your saving the christmas table !
(Not translatable; a business that`s going ok in Norway, usually gives their employee a nice dinner and a party around christmas times)