1. **State the problem:** A chef bought 76.189 pounds of white rice and 93.818 pounds of brown rice. We need to find the total amount of rice bought. 2. **Formula used:** To find the total weight, we add the weights of white rice and brown rice: $$\text{Total rice} = \text{White rice} + \text{Brown rice}$$ 3. **Substitute the values:** $$\text{Total rice} = 76.189 + 93.818$$ 4. **Perform the addition:** $$76.189 + 93.818 = 170.007$$ 5. **Conclusion:** The chef bought a total of **170.007 pounds** of rice.