Confidence votes 36. calcium is usually found under rocks and in bones and muscles In nature, calcium is found in rocks, chalk, and seashells. It is found in the bones, muscles, and nerves of animals and in many different plants.In the food you eat, there is a lot of calcium in milk and other dairy products.There is also a good deal of calcium in green leafy vegetables like spinach. Some foods like orange juice are frequently supplemented with calcium too.t is found in the bones, muscles, and nerves of animals and in many different plants. In the food you eat, there is a lot of calcium in milk and other dairy products. There is also a good deal of calcium in green leafy vegetables like spinach. Some foods like orange juice are frequently supplemented with calcium too.
View Full Document. 1  The incremental costs would be defined as the costs that are added by the additional pairs of shoes that the company is going to add to the production as well as the machine costs associated with them. 200 Shoes added to production = 20 + 0.16 X 200 = 23.2 + 2000 (Equipment Costs) = 2023.2 c.
Save. Economics is the study of transactions between producers and consumers with limited resources. Because the money used to produce one product could have been used to produce something else, each transaction involves an economic cost of implicit and explicit value to both buyer and seller.xplicit costs include the exchange of money for a good or service. The implicit cost refers to the tangible costs for which no money is exchanged. Economists count the implicit and explicit costs together when determining the value of a thing.