Final answer:
Without full production data, the law of comparative advantage can't be precisely applied. However, assuming given production quantities, Country A should export LRVs and Country B should export buses, as Country A produces more LRVs and Country B produces more buses.
Step-by-step explanation:
To determine which products each country should export according to the law of comparative advantage, we need to identify which country has the lower opportunity cost for producing each good. The law of comparative advantage states that a country should specialize in producing and exporting the good for which it has the lower opportunity cost, and import the good for which it has the higher opportunity cost.
From the information provided in the question, which seems to be incomplete, we don't have the full data to calculate the opportunity costs. Normally, we'd compare the number of units of one product that must be forgone to produce an additional unit of the other product. However, if we assume that Country A and Country B have the production capabilities mentioned in SEO keywords (500 LRVs for Country A and 450 LRVs for Country B, and 1000 buses for Country A and 1350 buses for Country B), we can conclude the following:
Country A produces more LRVs than Country B (500 > 450), but Country B produces more buses than Country A (1350 > 1000). Thus, assuming the numbers represent their production with a fixed quantity of resources, Country A would have a comparative advantage in producing LRVs and Country B in producing buses, implying that Country A should export LRVs and Country B should export buses.