1. **State the problem:** You have 80000 birr and want to buy fuel at two different prices: 131.90 birr per liter and 129.31 birr per liter. We want to find how many liters you can buy at each price and if the money will be completely spent. 2. **Formula:** To find liters bought, use the formula $$\text{liters} = \frac{\text{money}}{\text{price per liter}}$$ 3. **Calculate liters for the first price:** $$\text{liters}_1 = \frac{80000}{131.90} \approx 606.71$$ liters 4. **Calculate remaining money after first purchase:** $$\text{remaining} = 80000 - (606.71 \times 131.90) \approx 80000 - 79999.95 = 0.05$$ birr 5. **Calculate liters for the second price with remaining money:** $$\text{liters}_2 = \frac{0.05}{129.31} \approx 0.00039$$ liters 6. **Check if money is gone:** The remaining money after buying fuel at the first price is almost zero, so effectively your 80000 birr is fully spent. **Final answers:** - Liters at 131.90 birr/liter: approximately 606.71 liters - Liters at 129.31 birr/liter with remaining money: approximately 0.00039 liters - Your 80000 birr is essentially all spent.