can on the front page draw a petrol statiob and usually beside a petrol station there is a price, so you can draw before and after, may be before $1.50 and after $2.50(prices for 91 petrol.) And ive sent 2 pictures. For the graph put it in the can renewable energy replace oil page and the other you can put on any you want. Any question just ask me as I will try to reply you. Have a great weekend!
mismis2000