Comparison of Per-Liter Costs of Olive Oil Brands

Consider a store that sells two brands of organic olive oil. Brand A sells for $15 per liter, while Brand B sells for $20 per liter. The store decides to offer a promotion: customers can buy a package of Brand A that includes 3 liters and is priced at $36. Customers can also buy Brand B in a similar package of 2 liters for $35.

Calculate the per-liter cost of each package for both brands and compare these prices. Determine the relationship between the calculated average per-liter costs of both packages.