diff --git a/README.md b/README.md
index 7da719037037fe0ec3f9a32fc06cc4aad69c5a88..da24f00cc0181abde19a6a3ea96eb6520936bba8 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,4 @@
-[PACKAGE]: ../../raw/master/mkp/fritzbox_smarthome-0.8.6-20240106.mkp "fritzbox_smarthome-0.8.6-20240106.mkp"
+[PACKAGE]: ../../raw/master/mkp/fritzbox_smarthome-0.8.7-20240108.mkp "fritzbox_smarthome-0.8.7-20240108.mkp"
 # AVM Fritz!Box Smarthome
 
 This repository contains a additional check_MK Fritz!Box Agent which can gather informations over the AVM AHA HTTP Interface about SmartHome Devices connected to an Fritz!Box. 
diff --git a/mkp/fritzbox_smarthome-0.8.7-20240108.mkp b/mkp/fritzbox_smarthome-0.8.7-20240108.mkp
new file mode 100644
index 0000000000000000000000000000000000000000..6314480b0038cea9aa183137f6212c7a9fd8f100
Binary files /dev/null and b/mkp/fritzbox_smarthome-0.8.7-20240108.mkp differ
diff --git a/source/agent_based/fritzbox_smarthome_power_meter.py b/source/agent_based/fritzbox_smarthome_power_meter.py
index 89ee6be9b387cbe0ef81881c9d2a79ece766998b..a337af5f6325e628e439f6aaa774d3b808f35668 100644
--- a/source/agent_based/fritzbox_smarthome_power_meter.py
+++ b/source/agent_based/fritzbox_smarthome_power_meter.py
@@ -178,6 +178,7 @@ def _cost_period_x(
         period_name: str,
         current_period: int,
         rate_name: str,
+        metric_name: str,
         last_reading: float,
         precision: int,
         message: str,
@@ -189,21 +190,22 @@ def _cost_period_x(
     if stored_period := value_store.get(period_name):
         value_store[period_name] = current_period
 
+    cost = last_reading / 1000 * cost_kwh
+
     if current_period != stored_period:
         value_store[period_name] = current_period
-        value_store[rate_name] = 0
-        value = last_reading
+        value_store[rate_name] = cost
     else:
-        value = value_store.get(rate_name, 0) + last_reading
-        value_store[rate_name] = value
+        cost = value_store.get(rate_name, 0) + cost
+        value_store[rate_name] = cost
 
-    value = round((value / 1000 * cost_kwh), precision)
+    cost = round(cost, precision)
 
     yield Result(
         state=State.OK,
-        notice=message.replace('__value__', f'{value:.4f}')
+        notice=message.replace('__value__', f'{cost:.4f}')
     )
-    yield Metric(name=rate_name, value=value)
+    yield Metric(name=metric_name, value=cost)
 
 
 def check_fritzbox_smarthome_energy_single(
@@ -272,7 +274,8 @@ def check_fritzbox_smarthome_energy_single(
                     value_store=value_store,
                     period_name='current_hour',
                     current_period=loca_time.tm_hour,
-                    rate_name='cost_per_hour',
+                    rate_name='cost_this_hour',  # don't reuse -> cost_per_hour
+                    metric_name='cost_per_hour',
                     last_reading=energy,
                     precision=6,
                     message=f'Hour_: __value__{unit_sign}',
@@ -282,7 +285,8 @@ def check_fritzbox_smarthome_energy_single(
                     value_store=value_store,
                     period_name='current_day',
                     current_period=loca_time.tm_mday,
-                    rate_name='cost_per_day',
+                    rate_name='cost_this_day',  # don't reuse -> cost_per_day
+                    metric_name='cost_per_day',
                     last_reading=energy,
                     precision=4,
                     message=f'Day__: __value__{unit_sign}',
@@ -292,7 +296,8 @@ def check_fritzbox_smarthome_energy_single(
                     value_store=value_store,
                     period_name='current_month',
                     current_period=loca_time.tm_mon,
-                    rate_name='cost_per_month',
+                    rate_name='cost_this_month',  # don't reuse -> cost_per_month
+                    metric_name='cost_per_month',
                     last_reading=energy,
                     precision=4,
                     message=f'Month: __value__{unit_sign}',
@@ -302,7 +307,8 @@ def check_fritzbox_smarthome_energy_single(
                     value_store=value_store,
                     period_name='current_year',
                     current_period=loca_time.tm_year,
-                    rate_name='cost_per_year',
+                    rate_name='cost_this_year',  # don't reuse -> cost_per_year
+                    metric_name='cost_per_year',
                     last_reading=energy,
                     precision=4,
                     message=f'Year_: __value__{unit_sign}',
diff --git a/source/packages/fritzbox_smarthome b/source/packages/fritzbox_smarthome
index 45968ae4d2306c872ea56efe8953340340c72d1a..e5b06686c4dc2a3474f913e93d38ea7bf06f4cc9 100644
--- a/source/packages/fritzbox_smarthome
+++ b/source/packages/fritzbox_smarthome
@@ -50,7 +50,7 @@
                    'plugins/views/fritzbox_smarthome.py']},
  'name': 'fritzbox_smarthome',
  'title': 'Fritz!Box SmartHome',
- 'version': '0.8.6-20240106',
+ 'version': '0.8.7-20240108',
  'version.min_required': '2.2.0b1',
  'version.packaged': '2.2.0p17',
  'version.usable_until': None}