1. **State the problem:** Gemechu bought sheep and sold them for 4650 birr. He made a 7% profit on the selling price. We need to find how much he originally paid for the sheep. 2. **Define variables:** Let $C$ be the cost price (the amount Gemechu paid). Given selling price $S = 4650$ birr. Profit percentage = 7% of the selling price. 3. **Calculate profit in birr:** $$\text{Profit} = 7\% \times S = 0.07 \times 4650 = 325.5$$ birr 4. **Relate cost price and selling price:** Since selling price = cost price + profit, $$S = C + \text{Profit}$$ Thus, $$C = S - \text{Profit} = 4650 - 325.5 = 4324.5$$ birr 5. **Final answer:** Gemechu bought the sheep for **4324.5** birr.