Propane costs in Southern Ontario, Peterborough/Toronto area?

Question:We are buying a house that has propane heat. It is a 1200 sq ft 2 story house. Walls are 18" thick. The home has 2 rental propane tanks. We are trying to figure out how much we will end up paying to fill the propane tanks, or how much a month propane heat should reasonably cost. There is a brand new propane stove in the living room that is vented thru the house as the main source of heat.
Can you give me a ballpark $$ figure to work with in regards to the price of propane or monthly propane heating costs?

Thank you!

(The house is near Peterborough, Ontario)

Answers:
I think it's easier to just give you this link.

http://www.energy.gov.on.ca/index.cfm?fu...