Life on earth has become hell. Zombies and mummies run amock and kill people in unpleasant ways. To avoid being killed and to prosper you have set up shop selling Tannis Leaf Life-Giving Potions that sustain zombies and mummies. You can sell Mummy Life Potion for $300 and Zombie Life Potion for $100. It requires 5 liters of putrid slurry to make a zombie potion and 10 liters to make a mummy potion. Then for the magic: both zombie and mummy potions require exactly 4 tannis leaves. In the back room you have 500 liters of putrid slurry and 320 tannis leaves. In order to maximize revenue, what is the ideal number of Mummy Life Potions and Zombie Life Potions?