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.
Let dry. Rub the entire potato with olive oil and kosher salt. Prick with a fork three or four times to allow steam to escape while baking. Place potatoes directly on the oven rack and bake at 400 degrees for about 50 minutes, depending on the size of your potatoes. I start checking the potatoes at about 40 minutes.