A firm produces two types of graphics calculators, x hundreds of type A and y hundreds of type B per month. The revenue and cost equations (in thousands of Ringgit Malaysia) for the month are: R (x,y) =-0.2x? - 0.25y? - 0.2xy - + 200x +160y C (x, y) =100 X + 70y +4000 a) Determine the number of each type calculators that should be produced to maximize profit. b) Determine the maximum profit. answer: a) x =200 units, y= 100 units b) RM10,500

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