Hellstone Bar. Hellstone Bars are made from 1 Obsidian and 3 Hellstone at a Hellforge. They are used to create Hellstone Tier items. Items made from Hellstone Bars are the highest quality craftable pre-hardmode items that require bars.
Unitary elastic means that elasticity is equal to 1. In case of price elasticity of demand, e = 1 implies that the percentage change in quantity demanded is equal to the percentage change in price of the commodity. Demand Elasticity is obviously negative. Elasticity = percentage change in quantity demanded / percentagechange in price. Even though perfect real life examples would be tough to list, a close example can be a 1$ increase in price of a good leads to a unit fall in its quantity demanded.
Elasticity of demand is consumers' responsiveness or sensitivity to changes in price. Elastic demand is when consumers buy significantly more or less of a product when its price changes. Inelastic demand means that an increase or decrease in price will not significantly affect demand for the product. The boot camp is providing some examples of the types of elasticity. One of the toy company's products is a baby item that simulates a car driving.