The annual labor and automated equipment cost (in millions of dollars) for a company's production of HDTV's

Question:

The annual labor and automated equipment cost (in millions of dollars) for a company's production of HDTV's is given by
C(x,y) = 2x2 + 2xy + 3y2 - 16x - 18y + 54
Where x is the amount spent per year on labor and y is the amount spent per year on automated equipment (both in millions of dollars). Determine how much should be spent on each per year to minimize this cost. What is the minimum cost?