A firm 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)=140x+170y+0.06xy−0.09x2−0.06y2        ​C(x,y)=6x+9y+30,000   Find Px​(1400​,1700​) and Py​(1400​,1700​), and interpret the results.

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