diff --git a/brmbar3/brmbar/Shop.py b/brmbar3/brmbar/Shop.py
index 4100592..4c32973 100644
--- a/brmbar3/brmbar/Shop.py
+++ b/brmbar3/brmbar/Shop.py
@@ -185,31 +185,11 @@ class Shop:
     def credit_negbalance_str(self, overflow=None):
         return self.currency.str(-self.credit_balance(overflow=overflow))
 
-    # XXX causing extra heavy delay ( thousands of extra SQL queries ), disabled
     def inventory_balance(self):
-        balance = 0
-        # Each inventory account has its own currency,
-        # so we just do this ugly iteration
-        cur = self.db.execute_and_fetchall(
-            "SELECT id FROM accounts WHERE acctype = %s", ["inventory"]
-        )
-        for inventory in cur:
-            invid = inventory[0]
-            inv = Account.load(self.db, id=invid)
-            # FIXME: This is not correct as each instance of inventory
-            # might have been bought for a different price! Therefore,
-            # we need to replace the command below with a complex SQL
-            # statement that will... ugh, accounting is hard!
-            b = inv.balance() * inv.currency.rates(self.currency)[0]
-            # if b != 0:
-            #     print(str(b) + ',' + inv.name)
-            balance += b
-        return balance
+        return self.db.execute_and_fetch("SELECT public.inventory_balance()")
 
-    # XXX bypass hack
     def inventory_balance_str(self):
-        # return self.currency.str(self.inventory_balance())
-        return "XXX"
+        return self.currency.str(self.inventory_balance())
 
     def account_list(self, acctype, like_str="%%"):
         """list all accounts (people or items, as per acctype)"""