Uses Economy.format to display costs

src/main/java/net/knarcraft/paidsigns/listener/SignListener.java

@@ -170,9 +170,8 @@ public class SignListener implements Listener {
      * @return <p>The message with the cost instead of the cost placeholder</p>
      */
     private String replaceCost(double cost, TranslatableMessage message) {
-        String unit = EconomyManager.getCurrency(cost != 1);
-        return String.format(PaidSigns.getStringFormatter().replacePlaceholders(message,
-                new String[]{"{cost}", "{unit}"}, new String[]{"%.2f", "%s"}), cost, unit);
+        return PaidSigns.getStringFormatter().replacePlaceholder(message,
+                "{cost}", EconomyManager.format(cost));
     }
 
 }

src/main/java/net/knarcraft/paidsigns/manager/EconomyManager.java

@@ -35,17 +35,13 @@ public final class EconomyManager {
     }
 
     /**
-     * Gets the name of the used currency
+     * Formats the given amount of currency according to the economy plugin's format
      *
-     * @param plural <p>Whether to get the plural name or the singular name</p>
-     * @return <p>The name of the used currency</p>
+     * @param amount <p>The amount of currency to format</p>
+     * @return <p>The formatted string</p>
      */
-    public static String getCurrency(boolean plural) {
-        if (plural) {
-            return economy.currencyNamePlural();
-        } else {
-            return economy.currencyNameSingular();
-        }
+    public static String format(double amount) {
+        return economy.format(amount);
     }
 
     /**

src/main/java/net/knarcraft/paidsigns/manager/TrackedSignManager.java

@@ -162,10 +162,9 @@ public final class TrackedSignManager {
         }
         EconomyManager.deposit(offlinePlayer, refundSum);
         if (offlinePlayer instanceof Player player) {
-            PaidSigns.getStringFormatter().displaySuccessMessage(player, String.format(
-                    PaidSigns.getStringFormatter().replacePlaceholders(PaidSignsTranslatableMessage.SUCCESS_REFUNDED,
-                            new String[]{"{cost}", "{unit}"}, new String[]{"%.2f", "%s"}), refundSum,
-                    EconomyManager.getCurrency(refundSum != 1)));
+            PaidSigns.getStringFormatter().displaySuccessMessage(player,
+                    PaidSigns.getStringFormatter().replacePlaceholder(PaidSignsTranslatableMessage.SUCCESS_REFUNDED,
+                            "{cost}", EconomyManager.format(refundSum)));
         }
     }