The estimated demand function (Moschini and Meilke, 1992) for Canadian processed pork is Q = 171 – 20p + 20pb + 3pc + 2Y, where Q is the quantity in million kilograms (kg) of pork per year, p is the dollar price per kg, pb is the price of beef per kg, pc is the price of chicken in dollars per kg, and Y is average income in thousands of dollars. What is the demand function if we hold pb, pc, and Y at their typical values during the period studied: pb = 4, pc = 3 1/3, and Y = 12.5? M