In our widget example, we will assume that the fixed cost for the stapler, pen, and âfactoryâ is $10 and the cost of each worker hired is $5 per worker. Since fixed costs are constant, the firm incurs $10 regardless of the level of output. Labor is the only variable cost computed by $5 times the number of workers.
How Bull Sharks Can Live in Both Ocean and Fresh Water. Although there are a handful of species that live in freshwater, we tend to think of sharks as being ocean dwellers. But there is also a very unique shark that can live in both ocean and fresh water estuaries and lakes: the Bull Shark.
Don't go swimming at dawn or dusk; don't go in the water if you are bleeding even a little bit; if you spot a shark calmly get out of the water as the shark will detect any fast movements; don't go out into the ocean alone and don't wear anything shiny in the ocean. Here are the World's Most Shark Infested Beaches.