A retailer is deciding how many of a certain product to stock. The historical probability distribution of sales for this product is O units, 0.1; 10 unit, 0.2; 20 units, 0.3, and 30 units, 0.4. The product costs $18 per unit and sells for $40 per unit. Any unsold units will be discarded. The largest conditional value (profit) in the entire payoff table for this scenario is O a. $660 profit O b. $-24 profit O c. $340 profit d. $17 profit e. $510 profit