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Revenue Function for Desks Country Workshop manufactures both finished and unfinished furniture for the home. The estimated quantities demanded each week of its rolltop desks in the finished and unfinished versions are x and y units when the corresponding unit prices are P = 200 10 9 = 160 - - dollars, respectively. For the weekly total revenue function R(x, y), compute the values of R(80, 40) and R(40, 80). R(80, 40) = R(40, 80) = Interpret your results. R(80, 40) says that the revenue from sales of of the finished and of the unfinished furniture pieces per week is $ R(40, 80) says that the revenue from sales of of the finished and of the unfinished furniture pieces per week is $ Revenue Functions for a Book Publisher Weston Publishing publishes a deluxe edition and a standard edition of its Spanish-English dictionary. Weston's management estimates that the number of deluxe editions demanded is x copies/day and the number of standard editions demanded is y copies/day when the unit prices are D = 21 - 0.009x - 0.002y 7 = 25 - 0.002x - 0.003y dollars, respectively. (a) Find the daily total revenue function R(x, y). R(X, V) = (b) Find the domain of the function R. (Enter your answers using interval notation.) The domain is the set of all ordered pairs (x, y) such that x E . YE 21 - 0.009x - 0.002y E and 25 - 0.002x - 0.003y E