Travel Bunny stayed in Québec City early May 2011, here is a summary of the associated travel costs:
La Belle Planete Backpacker Hostel – CAD$30/night
(note: price on Hostelbookers did not include 5% GST or 7.5% TVQ (Quebec sales tax), price above does include taxes)
Downtown & historic Quebec City is very walkable, no local transportation was taken.
Return bus ticket to/from Montreal with Orléans Express as a student (valid ID required): CAD$74.40
Lunch special @ le Cochon Dingue (historic centre) – CAD $20 (including taxes & tip)
Beaver tail (Canadian dessert specialty) – CAD $5.65
Groceries for 2 days (frozen dinner, breakfast cereals, snacks & packed lunch) – CAD $35
Van Houtte cup of coffee (famous Quebec coffee house) – CAD$3.60
Bakery baguette – CAD$2.50
Did not pay to enter any tourist attractions.
Note: there are daily guided tours of the Château Frontenac for about $CAD10 for an adult, booking in advance recommended!