1. The problem statement, all variables and given/known data A rectangular region of 125,000 sq ft is fenced off. A type of fencing costing $20 per foot was used along the back and front of the region. A fence costing $10 per foot was used for the other sides. What were the dimensions of the region that minimized the cost of the fence? 2. Relevant equations A=l*w 3. The attempt at a solution I haven't a clue where to begin with this. What should I be thinking?