@@ -0,0 +1,81 @@
+package store.promotion;
+
+import store.io.InputView;
+import store.io.OutputView;
+import store.object.Amount;
+
+import java.time.LocalDate;
+import java.time.LocalDateTime;
+
+public class Promotion {
+    private final InputView inputView = new InputView();
+    private final OutputView outputView = new OutputView();
+    private final String name;
+    private final int buy;
+    private final int get;
+    private final LocalDate startDate;
+    private final LocalDate endDate;
+
+    public Promotion(String name, int buy, int get, LocalDate startDate, LocalDate endDate) {
+        this.name = name;
+        this.buy = buy;
+        this.get = get;
+        this.startDate = startDate;
+        this.endDate = endDate;
+    }
+
+    public Amount apply(String productName, int price, int quantity, int amount) {
+        int total = buy + get;
+        int maxAmount = quantity / total * total;
+        if (amount <= maxAmount && amount % total == 0) {
+            return new Amount(productName, price, amount, amount / total, 0, 0);
+        }
+        if (amount % total == buy && amount < maxAmount) {
+            return additionalGet(productName, price, quantity, amount, total);
+        }
+        return additionalBuy(productName, price, quantity, amount, total, maxAmount);
+    }
+
+    public Amount additionalGet(String productName, int price, int quantity, int amount, int total) {
+        outputView.promotionAdditionalGuide(productName);
+        if (inputView.readAnswer().equals("Y")) {
+            return new Amount(productName, price, amount + 1, (amount + 1) / total, 0, 0);
+        }
+        return new Amount(productName, price, amount, amount / total, 0, 0);
+    }
+
+    public Amount additionalBuy(String productName, int price, int quantity, int amount, int total, int maxAmount) {
+        int impossibleAmount = calcImpossibleAmount(amount, total, maxAmount);
+        outputView.promotionImpossibleGuide(productName, impossibleAmount);
+        if (inputView.readAnswer().trim().equals("Y")) {
+            if (quantity - (amount - impossibleAmount) < impossibleAmount) {
+                return new Amount(productName, price, quantity, (amount - impossibleAmount) / total, amount - quantity, impossibleAmount);
+            }
+            return new Amount(productName, price, amount, (amount - impossibleAmount) / total, 0, impossibleAmount);
+        }
+        return new Amount(productName, price, amount - impossibleAmount, (amount - impossibleAmount) / total, 0, 0);
+    }
+
+    public int calcImpossibleAmount(int amount, int total, int maxAmount) {
+        int impossibleAmount = amount % total;
+        if (amount > maxAmount) {
+            impossibleAmount = amount - maxAmount;
+        }
+        return impossibleAmount;
+    }
+
+    public boolean isPossible(LocalDateTime now) {
+        LocalDate nowDate = now.toLocalDate();
+        return (startDate.isBefore(nowDate) || startDate.isEqual(nowDate)) &&
+                (endDate.isAfter(nowDate) || endDate.isEqual(nowDate));
+    }
+
+    public boolean isMatch(String promotion) {
+        return promotion.equals(name);
+    }
+
+    @Override
+    public String toString() {
+        return this.name;
+    }
+}

리뷰: ```suggestion
        return !startDate.isAfter(nowDate) &&
                !endDate.isBefore(nowDate);
```
이렇게 바꾸면 더 깔끔하게 코드를 만들 수 있을 것 같습니다