How do I construct a table showing marginal sales per day for three different states with the following data?
Washington Oregon Idaho Days Gross Sales Days Gross Sales Days Gross Sales 0 $10,000 0 $0 0 $6,250 1 25,000 1 8,750 1 12,500 2 37,500 2 16,250 2 17,500 3 47,500 3 22,500 3 21,250 4 55,000 4 26,250 4 23,750 5 60,000 5 28,750 5 25,000 6 62,500 6 30,000 6 25,000 7 62,500 7 31,250 7 25,000
Construct a table showing Grey's marginal sales per day in each state