2. A construction supplier is determining which type of cement sells the best. The table shows the rates at which each type sold. A workday is 8 hours, and each pound of cement sells for 4.50. List the types of cements in order from highest to lowest unit rate of

A Forty pounds were sold in one day.
B 6 y=2 x, where x is in pounds and y is in hours
C After 3 hours, 45 worth had been sold.
D The ratio of days to pounds sold was 2: 60.