Piggy Bank

Rule

1. This event does not have a reward collection time, but all operations and collections must be completed before the event ends.
2. During the event, your piggy bank will receive %3$s Gold Coins for every %2$d Gold Coins you spend.
3. During the event, your piggy bank will receive %5$s Gold Coins for every %4$d Gold Coins you purchase. 
4. When your piggy bank has accumulated %1$d Gold Coins, you may open it to receive all the Gold Coins you have saved. 
5. The piggy bank may only be opened once. After opening the piggy bank further Gold Coins will not be deposited.
6. Once the event ends, Gold Coins deposited into an unopened piggy bank will not be refunded.