You are setting up a spread trade based on the idea that you are bullish on crude products relative to refined products. Therefore you are long 100 WTI contracts and also short 100 RBOB contracts. The closing price yesterday for WTI was $43.00 per barrel and the closing price today is $43.50. The closing price yesterday for RBOB was $1.45 per gallon and the closing price today is $1.50. What is your new mark to market P&L on this trade? Were you successful in setting up this trade?