Figure 8-3 Figure 8-3 Above Shows the Demand and Cost

Figure 8-3 Figure 8-3 above shows the demand and cost curves facing a monopolist.
-Refer to Figure 8-3.Suppose the monopolist represented in the diagram produces positive output.What is the profit/loss per unit?

A) Loss of $7 per unit
B) Profit of $30 per unit
C) Loss of $21 per unit
D) Profit of $14 per unit