@@ -0,0 +1,163 @@
+package features;
+
+import java.util.Map;
+
+import constants.Menus.Appetizer;
+import constants.Menus.Beverage;
+import constants.Menus.Dessert;
+import constants.Menus.MainMenu;
+import data.EventData;
+
+import static constants.Constants.*;
+
+public class Statistics {
+	
+	public Statistics(EventData dto) {
+		this.visitDate=dto.getVisitDate();
+		this.orders=dto.getOrders();
+		this.day_week_meter=visitDate%DAYS_OF_A_WEEK;
+	}
+	
+	private Map<String, Integer> orders;
+	private int visitDate;
+	private int day_week_meter;
+	
+	//처리요구 데이터
+	private int totalCostOrigin;
+	private int totalDiscount;
+	private int[] discountDetails=new int[5];
+	
+	private int dessertOrderedCnt;
+	private int mainMenuOrderedCnt;
+	
+	//증정메뉴
+	public boolean deserveGift() {
+		if(totalCostOrigin>=120000) {
+			return true;
+		}
+		return false;
+	}
+
+	//할인전 총주문금액
+	public int getTotalCostOrigin() {		
+		for(Map.Entry<String, Integer> order:orders.entrySet()) {
+			getSum(order.getKey(), order.getValue());
+		}
+		return totalCostOrigin;
+	}
+	
+	private void getSum(String dish,int servings) {
+		appetizerCost(dish, servings);
+		mainMenuCost(dish, servings);
+		dessertCost(dish, servings);
+		beverageCost(dish, servings);
+	}
+	
+	private void appetizerCost(String dish,int servings) {
+		for(Appetizer ap:Appetizer.values()) {
+			if(ap.appetizer().equals(dish)) {
+				totalCostOrigin+=servings*ap.price();
+			}
+		}
+	}
+	
+	private void mainMenuCost(String dish,int servings) {
+		for(MainMenu ma:MainMenu.values()) {
+			if(ma.main().equals(dish)) {
+				totalCostOrigin+=servings*ma.price();
+				mainMenuOrderedCnt+=servings;
+			}
+		}
+	}
+	
+	private void dessertCost(String dish,int servings) {
+		for(Dessert de:Dessert.values()) {
+			if(de.dessert().equals(dish)) {
+				totalCostOrigin+=servings*de.price();
+				dessertOrderedCnt+=servings;
+			}
+		}
+	}
+	
+	private void beverageCost(String dish,int servings) {
+		for(Beverage be:Beverage.values()) {
+			if(be.beverage().equals(dish)) {
+				totalCostOrigin+=servings*be.price();
+			}
+		}
+	}
+	
+	//혜택내역
+	public int[] getDiscountDetails() {
+		discountDetails[0]=d_dayDiscount();
+		discountDetails[1]=weekDiscount();
+		discountDetails[2]=specialDiscount();
+		discountDetails[3]=giftDiscount();
+
+		return discountDetails;
+	}
+	
+	private int d_dayDiscount() {
+		if(visitDate<=25) {
+			return D_DAY_DISCOUNT_BASIC+(visitDate-1)*D_DAY_DISCOUNT_PER_DAY;
+		}
+		return 0;
+	}
+	
+	private int weekDiscount() {
+		if(isWeekend()) {
+			discountDetails[4]=1;
+			return mainMenuOrderedCnt*WEEK_DISCOUNT;
+		}
+		discountDetails[4]=0;
+		return dessertOrderedCnt*WEEK_DISCOUNT;
+	}
+	
+	private boolean isWeekend() {
+		if(day_week_meter==FRIDAY_METER||day_week_meter==SATURDAY_METER) {
+			return true;
+		}
+		return false;
+	}
+	
+	private int specialDiscount() {
+		if(day_week_meter==SUNDAY_METER||visitDate==DATE_OF_CHRISTMAS) {
+			return SPECIAL_DISCOUNT;
+		}
+		return 0;
+	}
+	
+	private int giftDiscount() {
+		if(deserveGift()) {
+			return -Beverage.CHAMPAGNE.price();
+		}
+		return 0;
+	}
+	
+	//총혜택금액
+	public int getTotalDiscount() {		
+		for(int i=0;i<DISCOUNT_TYPES_CNT;i++) {
+			totalDiscount+=discountDetails[i];
+		}
+		return totalDiscount;
+	}
+	
+	//할인후 예상결제금액
+	public int getResultCost() {
+		return totalCostOrigin+totalDiscount;
+	}
+	
+	//이벤트 배지
+	public String badgeReceivable() {
+		if(-totalDiscount>=5000&&-totalDiscount<10000) {
+			return "별";
+		}
+		if(-totalDiscount>=10000&&-totalDiscount<20000) {
+			return "트리";
+		}
+		if(-totalDiscount>=20000) {
+			return "산타";
+		}
+		return "없음";
+	}
+}

리뷰: 수식을 반환해도 될 것 같아요!

```java
return totalCostOrigin >= 120000;
```