Suppose you sell ten July 2021 platinum futures contracts on this day, at the last price of the day which is 1,427.90 per ounce. Each contract is for 50 ounces.

a) What will your cumulative mark to market be if platinum prices turn out to be $1,430.42 per ounce at expiration? (Do not round intermediate calculations. Enter your answer as a positive value if a profit or as a negative number if a loss. Round to the nearest whole number, i.e. dollar, e.g., 32.)

b) What will your cumulative mark to market be if platinum prices are $1,422.10 per ounce at expiration? (Do not round intermediate calculations. Enter your answer as a positive value if a profit or as a negative number if a loss. Round to the nearest whole number, i.e. dollar, e.g., 32.)

Please include if each answer is negative or positive.