diff --git a/src/main/java/cc/carm/plugin/ultradepository/manager/EconomyManager.java b/src/main/java/cc/carm/plugin/ultradepository/manager/EconomyManager.java
index 13f0310..de0ceed 100644
--- a/src/main/java/cc/carm/plugin/ultradepository/manager/EconomyManager.java
+++ b/src/main/java/cc/carm/plugin/ultradepository/manager/EconomyManager.java
@@ -12,6 +12,9 @@ import cc.carm.plugin.ultradepository.hooker.VaultHooker;
 import org.bukkit.Bukkit;
 import org.bukkit.entity.Player;
 
+import java.math.BigDecimal;
+import java.math.RoundingMode;
+
 public class EconomyManager {
 
 	VaultHooker hooker;
@@ -35,9 +38,9 @@ public class EconomyManager {
 
 	public double sell(Player player, double price, int amount) {
 		if (!isInitialized()) return 0D;
-		double money = price * amount;
-		getHooker().addMoney(player, money);
-		return money;
+		BigDecimal money = BigDecimal.valueOf(price * amount).setScale(2, RoundingMode.DOWN);
+		getHooker().addMoney(player, money.doubleValue());
+		return money.doubleValue();
 	}
 
 	public void sellAllItem(Player player, UserData userData) {
diff --git a/src/test/java/MoneyTest.java b/src/test/java/MoneyTest.java
new file mode 100644
index 0000000..dd29fb4
--- /dev/null
+++ b/src/test/java/MoneyTest.java
@@ -0,0 +1,20 @@
+import org.junit.Test;
+
+import java.math.BigDecimal;
+import java.math.RoundingMode;
+
+public class MoneyTest {
+
+	@Test
+	public void test() {
+		System.out.println(get(1.2, 100));
+		System.out.println(get(0.55, 10));
+		System.out.println(get(0.21, 5));
+	}
+
+
+	public double get(double price, int amount) {
+		BigDecimal money = BigDecimal.valueOf(price * amount).setScale(2, RoundingMode.DOWN);
+		return money.doubleValue();
+	}
+}