diff --git a/brewman/brewman/models/inventory.py b/brewman/brewman/models/inventory.py
index 588f2384..a10000a0 100644
--- a/brewman/brewman/models/inventory.py
+++ b/brewman/brewman/models/inventory.py
@@ -38,7 +38,6 @@ class Inventory(Base):
         tax=None,
         discount=None,
         batch=None,
-        product=None,
     ):
         self.id = id_
         self.voucher_id = voucher_id
diff --git a/brewman/brewman/routers/batch_integrity.py b/brewman/brewman/routers/batch_integrity.py
index 61dc0d7e..bfad5791 100644
--- a/brewman/brewman/routers/batch_integrity.py
+++ b/brewman/brewman/routers/batch_integrity.py
@@ -5,7 +5,7 @@ from typing import List
 import brewman.schemas.batch_integrity as schemas
 
 from fastapi import APIRouter, Security
-from sqlalchemy import func, select, update
+from sqlalchemy import distinct, func, select, update
 from sqlalchemy.orm import Session, contains_eager
 
 from ..core.security import get_current_active_user as get_user
@@ -179,16 +179,13 @@ def fix_batch_prices(db: Session) -> None:
 def fix_single_batch_prices(batch_id: uuid.UUID, db: Session) -> None:
     list_ = (
         db.execute(
-            select(Batch)
-            .join(Batch.inventories)
-            .where(Batch.id == batch_id, Batch.rate != Inventory.rate)
-            .options(contains_eager(Batch.inventories))
+            select(distinct(Inventory.voucher_id))
+            .join(Inventory.batch)
+            .where(Inventory.batch_id == batch_id, Batch.rate != Inventory.rate)
         )
-        .unique()
         .scalars()
         .all()
     )
 
-    for batch in list_:
-        for inv in batch.inventories:
-            refresh_voucher(inv.voucher_id, inv.product_id, db)
+    for voucher_id in list_:
+        refresh_voucher(voucher_id, batch_id, db)
diff --git a/brewman/brewman/routers/issue.py b/brewman/brewman/routers/issue.py
index 601982c2..98f18def 100644
--- a/brewman/brewman/routers/issue.py
+++ b/brewman/brewman/routers/issue.py
@@ -8,7 +8,7 @@ import brewman.schemas.input as schema_in
 import brewman.schemas.voucher as output
 
 from fastapi import APIRouter, Depends, File, HTTPException, Request, Security, status
-from sqlalchemy import distinct, or_, select
+from sqlalchemy import distinct, func, or_, select, update
 from sqlalchemy.exc import SQLAlchemyError
 from sqlalchemy.orm import Session
 
@@ -339,18 +339,19 @@ def update_journals(
             item.amount = amount
 
 
-def refresh_voucher(id_: uuid.UUID, product_id: uuid.UUID, db: Session) -> None:
+def refresh_voucher(id_: uuid.UUID, batch_id: uuid.UUID, db: Session) -> None:
     try:
-        voucher: Voucher = db.execute(select(Voucher).where(Voucher.id == id_)).scalar_one()
-        voucher.last_edit_date = datetime.utcnow()
-        inv = next(i for i in voucher.inventories if i.product_id == product_id)
-        batch = db.execute(select(Batch).where(Batch.id == inv.batch_id)).scalar_one()
-        inv.rate = batch.rate
-        inv.tax = batch.tax
-        inv.discount = batch.discount
-        amount = sum(i.amount for i in voucher.inventories)
-        for journal in voucher.journals:
-            journal.amount = amount
+        db.execute(update(Voucher).where(Voucher.id == id_).values(last_edit_date=datetime.utcnow()))
+        batch = db.execute(select(Batch).where(Batch.id == batch_id)).scalar_one()
+        db.execute(
+            update(Inventory)
+            .where(Inventory.voucher_id == id_, Inventory.batch_id == batch_id)
+            .values(rate=batch.rate, tax=batch.tax, discount=batch.discount)
+        )
+        amount = round(
+            db.execute(select(func.sum(Inventory.amount)).where(Inventory.voucher_id == id_)).scalar_one(), 2
+        )
+        db.execute(update(Journal).where(Journal.voucher_id == id_).values(amount=amount))
     except SQLAlchemyError as e:
         raise HTTPException(
             status_code=status.HTTP_500_INTERNAL_SERVER_ERROR,
diff --git a/brewman/brewman/schemas/recipe_item.py b/brewman/brewman/schemas/recipe_item.py
new file mode 100644
index 00000000..328506d3
--- /dev/null
+++ b/brewman/brewman/schemas/recipe_item.py
@@ -0,0 +1,16 @@
+import uuid
+from typing import Optional
+
+from pydantic import BaseModel
+
+from brewman.schemas.product import ProductLink
+
+
+class RecipeItem(BaseModel):
+    id_: Optional[uuid.UUID]
+    product: ProductLink
+    quantity: int
+    price: int
+
+    class Config:
+        fields = {"id_": "id"}
\ No newline at end of file