High tariffs. Tariffs are increased prices on goods.
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Answer:
It can be inferred that Mark lives alone and could be financially unstable.
Explanation:
There can be several factors regarding such practice of Mark. Since he buys from a nearby store that has limited variety of products and canned food it can be assumed that Mark lives alone and there are not much residents to demand for change in purchasing of food items. Mark might also be financially unstable to travel to some other store variety products are available and are expensive for him to buy.
Moreover, it's also a possibility that Mark prefers canned food over fresh food.