Final answer:
If the demand for coffee is relatively inelastic and the price is raised, the total revenue will increase.
Step-by-step explanation:
If the demand for coffee is relatively inelastic and your friend raises the price of coffee at their coffee shop, the total revenue will increase. Inelastic demand means that a change in price will have a small impact on the quantity of coffee consumed. So, even if the price is increased, customers are still likely to purchase coffee, leading to higher total revenue.