To calculate these costs, you must consider these aspects of the manufacturing environment: Product costing (detailed information) for material, labor, and overhead. Cost reporting (what does the item really cost to produce). Variance reporting (actual versus standard costs).
In a pot, heat water until it boils. Once it boils, add in your potatoes. After about 20 minutes, you can try forking in your potatoes to see how tender it is. Now, another factor on the length of cooking potatoes is how big your potatoes are. Of course, if you use really small potatoes, they will become tender easily.
Space the potatoes on a rack in the preheated oven so there is at least an inch of space around each potato. In a standard oven you should be able to have three rows with five potatoes in each row. Bake the potatoes for about 50 minutes. Use an oven mitt to remove one potato to test it. The potato is done if it feels soft and has a tender feel when you pierce it with a fork. If the potato is not done, put it back in and cook an additional 10 minutes.