15.11. The Supermart Store is about to place an order for Valentine’s Day candy. The candy can be bought for $1.40 per box, and it is sold for $2.90 per box up to Valentine’s Day. After Valentine’s Day, any remaining boxes are sold for $1.00 each. All surplus candy can be sold at this reduced price. Demand at the regular retail price is a random variable with the following discrete probability distribution is shown below.