Suppose a Hypothetical CBOT 7-Year U

Suppose a hypothetical CBOT 7-year U.S. ,semiannual payment,6% coupon Treasury note futures contract has a quoted price of 88-300.If annual interest rates go down by 1.00 percentage point,what is the gain or loss on the futures contract? (Assume a $1,000 par value,round the new interest rate to 4 decimal places when written as a decimal,and round the change in price up to the nearest whole dollar. ) Do not round other intermediate calculations.
?

A) $38
B) $55
C) $51
D) $56
E) $45