diff --git a/store/models.py b/store/models.py
index 6a47796..fdbd90f 100644
--- a/store/models.py
+++ b/store/models.py
@@ -14,7 +14,8 @@ from django.contrib.auth.models import AbstractUser, UserManager as _UserManager
 from django.core.files.base import ContentFile
 from django.core.validators import MinValueValidator, MaxValueValidator
 from django.db import models
-from django.db.models import F, Case, When, DecimalField, Prefetch
+from django.db.models import F, Case, When, DecimalField, Prefetch, Max, Q, ExpressionWrapper
+from django.db.models.functions import Ceil
 from django.db.models.lookups import GreaterThan
 from django.utils import timezone
 from django.utils.translation import gettext_lazy as _
@@ -91,6 +92,7 @@ class Category(MPTTModel):
 
     @property
     def commission_price(self):
+        """ Get commission from object or from its parent """
         if not self.commission and self.parent_id:
             return self.parent.commission_price
         else:
@@ -266,11 +268,13 @@ class ChecklistQuerySet(models.QuerySet):
         return self.order_by(F('status_updated_at').desc(nulls_last=True))
 
     def annotate_price_rub(self):
-        # FIXME: implement price_rub in DB query
-        return self
-
-        yuan_rate = GlobalSettings.load().yuan_rate
-        return self.annotate(_price_rub=F('price_yuan') * yuan_rate)
+        return self.annotate(
+            _yuan_rate=Case(
+                When(price_snapshot_id__isnull=False, then=F('price_snapshot__yuan_rate')),
+                default=GlobalSettings.load().yuan_rate
+            ),
+            _price_rub=Ceil(F('_yuan_rate') * F('price_yuan'))
+        )
 
     def annotate_commission_rub(self):
         # FIXME: implement category commission in DB query
@@ -418,10 +422,9 @@ class Checklist(models.Model):
 
     @property
     def price_rub(self) -> int:
-        # FIXME: implement price_rub in DB query
-        # # Prefer annotated field for calculation
-        # if hasattr(self, '_price_rub'):
-        #     return self._price_rub
+        # Prefer annotated field for calculation
+        if hasattr(self, '_price_rub'):
+            return self._price_rub
 
         # Get saved prices
         if self.price_snapshot_id: