Answer: according to the meaning of the question, you can only choose in plot b and apartment a \ b \ d.

Let x be the area and y be the floor coefficient.

Cocoa family * * * funds 20.5+12 = 325,000.

1，xy * 6000 * 0.95 & lt32.5* 10000

Xy & lt57.0 1 therefore, y can only be 0.7 and x can be 76.5.

2、xy * 6000 * 0.3 & lt32.5* 10000*0.5

That is xy < 90.28. There are many choices. If you choose the largest area, it is apartment A, 1 building.

If you choose a good floor, it is apartment D, 4th floor.

If you choose the most economical apartment D, the 6th floor.