[Forum Event] The Interesting Math Question Can Relax You!

COTK-Chen

Deal all, Forum event is coming again! Do you like math? Or are u good at math? This time we have prepared a problem about math for you. You need to write down the correct calculating process and answer according to the following conditions. Come to win huge rewards! In this hot summer, you must would like to drink a bottle of cold soda.

Question: How many bottles soda you will drink at most? (Match all of the following)
Condition 1: You can spend one dollar to buy a bottle of soda.
Condition 2: You can also use two drinked and empty bottles to exchange a bottle of soda.
Condition 3: You can't borrow bottle from shop.
Condition 4: You can only spend 20 dollars to drink soda.
Duration: Ends on Aug.13th
Servers: All servers
Requirements:
1.  Write down the correct calculating process and answer.
2.  Your IGN and server.
Rewards:
Players who write down the correct calculating process and answer will be rewarded with 50 gold.
Notes:
1.  The rewards will be released on Aug.14th.
2. If you do not post your information under forum event page, rewards will not be sent to your account.
3. Please read the requirements carefully or else you'll lose the chance to be rewarded
4. No abusive or rude remarks allowed in this event
5. The final explanation is reserved by COTK