Budget Constraints 2 Opp. cost of an extra unit of commodity 1 is p,/p2 units foregone of commodity 2 And +11 the opp. cost of an extra unit of commodity 2 is p2/p1 p2/ p,units foregone of commodity 1Budget Constraints x2 x1 Opp. cost of an extra unit of commodity 1 is p1 /p2 units foregone of commodity 2. And the opp. cost of an extra unit of commodity 2 is p2 /p1 units foregone of commodity 1. -p2 /p1 +1