Answer:
If the market floor is over demand, there is a surplus supply at that point. As a result , the number for oranges bought by the state would be Q1Q2 across the table.
Benefit is to the growers growing oranges as they've been having a better price and the cost is to the customers and community at large as it increases in deadweight losses. The triangular region in the graph reflects a moral hazard, DWL.