How many contracts do you need to purchase? How much will you pay for your ptatnum? What is your dosar profit if platinum sels for $1,200 a troy ounce wheb the sares cortract eques? What if the price is $1,210 at expiration? (A negative value should be indicated by a minus sbj. Do not rocind intermedate cabculations. Round yeur anvwers to the nearest whole number)