Answer:
Grocery shortages have ranged from reasonably concerning to harmlessly annoying this year. For example, the surge in panic-buying caused shortages of meat and flour in the spring, which understandably scared many Americans. But there have also been shortages of our favorite beverages and snacks, not necessarily the things we can't live without, but rather the things we don't want to live without, as food companies had to trim down their production pipelines.
Capitalism promotes free trade and free market while mercantilism limits the trade between countries so that more money is entering the country than out. Merchants will have a larger selection of what to sell under capitalism and unregulated sales.