Lucky logic for RxOperation Merge & Zip

​LuckyLogic.java

boolean luckyUser =  FortuneQueue.enterNo(API 2) == LuckyCategory.enterNo(API 3) && 
                     UserProfile.currentCategory(API 1) == LuckyCategory.category(API 3);
if(luckyUser) {
  boolean receiveSpecialDiscount = 
        ((FortuneQueue.luckyScale(API 2) * UserProfile.userExp(API 1))/ UserProfile.expToNextLevel(API 1)) 
        > 1;
  if(receiveSpecialDiscount) {
    discountAmount = totalBuy * LuckyCategory.discountRate(API 3);
    payAmount = totalBuy - discountAmount;

    System.out.println("ยินดีด้วย คุณได้ส่วนลดพิเศษเพิ่ม " + discountAmount + " บาท 
              ครั้งนี้คุณจ่ายเพียง " +  payAmount + " บาทเท่านั้น");
  }
}