A fence is put around a rectangular plot of land. The perimeter of
the fence is 28 feet. Two of the opposite sides of the fence cost $10
per foot. The other two sides cost $12 per foot. If the total cost of
the fence is $148, what are the dimensions of the fence?
1) 8 by 20
2) 4 by 10
3) 3 by 11
4) 2 by 12

Please help with a step by step explanation. Thanks!