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.
Cook Time. Cook the potatoes for about 20 minutes. At this time, you can start testing each potato with a fork every few minutes. If you're using bigger potatoes, you will likely need about 10 more minutes. Once the fork can easily be inserted into the largest of the potatoes, it's time to drain the potatoes.