A patch of grassland is home to five carnivores that are secondary consumers in the ecosystem. Each of the carnivores uses 2000 kcal of energy over the course of a day.

Assume that 10, of the energy available at each level of the food chain moves up to the next level of the food chain. Show that the primary consumers in the grassland use 100,000 kcal during a single day, and that grass and other producers use 1,000,000 kcal per day.