Sales ($ million)
convertible suv sedan mini truck marginal total
allison 45 28 19 36 128
b & b motors 65 22 15 9 111
pluto cars 18 25 27 10 80
panther motors 40 26 34 12 112
marginal total 168 101 95 67 431
the table shows the annual sales revenues for different types of vehicles made by four automobile manufacturers.
the number in the highlighted cell is . the relative frequency of this vehicle category compared with the total sales revenue of pluto cars is .