Arm produces two types of calculators each week, x of type A and y of type B. The weekly revenue and cost functions (in dollars) are as follows. R(x,y) = 120x + 190y + 0.08xy 0.05x2 - 0.09y2 C(x,y) = 9x + By + 20,000 Find Px(1200,1900) and Py(1200,1900), and interpret the results. Px(1200,1900)= :|