diff --git a/report/qa.qmd b/report/qa.qmd
index e7b5515..0801b7a 100644
--- a/report/qa.qmd
+++ b/report/qa.qmd
@@ -28,7 +28,7 @@ pd.set_option('display.max_columns', None)
 parse_dates = ['registration_date', 'transaction_date']
 date_parser = lambda x: datetime.strptime(x, '%Y-%m-%d')
 data = pd.read_csv(cons.fpath_randomtelecomtransdata,  parse_dates=parse_dates)
-userdata = pd.read_csv(cons.fpath_randomtelecomusersdata)
+userdata = pd.read_parquet(cons.fpath_randomtelecomusersdata)
 
 # show head of data
 data.head()
@@ -46,7 +46,7 @@ There shoule be exactly one unique userid for every UID.
 #| label: nunique-userids-per-uid
 nunique_userids_per_uid = data.groupby(by='uid').agg({'userid':'nunique'})
 sns.histplot(data=nunique_userids_per_uid,x='userid', bins = 20)
-tmp_data['userid'].notnull().value_counts()
+data['userid'].notnull().value_counts()
 ```
 
 ### Unique Fullnames per UID
@@ -97,7 +97,7 @@ data['email_domain'].notnull().value_counts()
 
 ### Unique Device Hash per UID
 
-A UID should have 1 to 3 devices. Note, device hash can be missing if the user uses an unregistered device.
+A UID should have 1 to 3 devices.
 
 ```{python}
 #| label: nunique-devices-per-uid
@@ -114,7 +114,7 @@ A UID should have 1 to 2 cards, with an overall distribution less than the corre
 #| label: nunique-cards-per-uid
 nunique_cards_per_uid = data.groupby(by='uid').agg({'card_hash':'nunique'})
 sns.histplot(data=nunique_cards_per_uid,x='card_hash', bins = 20)
-tmp_data['card_hash'].notnull().value_counts()
+data['card_hash'].notnull().value_counts()
 ```
 
 ### Unique IP Hash per UID
@@ -124,8 +124,8 @@ A UID should have between 1 and 10 ips.
 ```{python}
 #| label: nunique-ips-per-uid
 nunique_ips_per_uid = data.groupby(by='uid').agg({'ip_hash':'nunique'})
-sns.histplot(data=nunique_ips_per_uid,x='ip_hash')
-tmp_data['ip_hash'].notnull().value_counts()
+sns.histplot(data=nunique_ips_per_uid,x='ip_hash', bins = 10)
+data['ip_hash'].notnull().value_counts()
 ```
 
 ### Unique Application Hash per UID
@@ -133,8 +133,8 @@ tmp_data['ip_hash'].notnull().value_counts()
 ```{python}
 #| label: nunique-apps-per-uid
 nunique_apps_per_uid = data.groupby(by='uid').agg({'application_hash':'nunique'})
-sns.histplot(data=nunique_apps_per_uid,x='application_hash')
-tmp_data['ip_hash'].notnull().value_counts()
+sns.histplot(data=nunique_apps_per_uid,x='application_hash', bins = 10)
+data['ip_hash'].notnull().value_counts()
 ```
 
 ### Unique Transaction Hash per UID
@@ -142,8 +142,8 @@ tmp_data['ip_hash'].notnull().value_counts()
 ```{python}
 #| label: nunique-ips-per-uid
 nunique_ips_per_uid = data.groupby(by='uid').agg({'transaction_hash':'nunique'})
-sns.histplot(data=nunique_ips_per_uid,x='transaction_hash')
-tmp_data['transaction_hash'].notnull().value_counts()
+sns.histplot(data=nunique_ips_per_uid,x='transaction_hash', bins=10)
+data.assign(transaction_hash=data['transaction_hash'].notnull().astype(int)).groupby(by=['transaction_hash', 'transaction_payment_method'], as_index=False, dropna=False).agg({'transaction_amount':'sum'})
 ```
 
 ## Transaction
@@ -177,7 +177,7 @@ Each transaction hash should have a single transaction payment method associated
 nunique_paymentmethod_per_trans = data.groupby(by=['transaction_hash']).agg({'transaction_payment_method':'nunique'}).sort_values('transaction_payment_method')
 sns.histplot(data=nunique_paymentmethod_per_trans,x='transaction_payment_method', bins = 20)
 data.loc[data['transaction_hash'].isin(nunique_paymentmethod_per_trans[(nunique_paymentmethod_per_trans == 0)].index[:5]), :]
-data.loc[data['transaction_hash'].isin(nunique_paymentchannel_per_trans[(nunique_paymentchannel_per_trans == 0)].index[:5]), :]
+data.loc[data['transaction_hash'].isin(nunique_paymentmethod_per_trans[(nunique_paymentmethod_per_trans == 0)].index[:5]), :]
 data.groupby(by=['card_type', 'transaction_payment_method'], as_index=False, dropna=False).agg({'transaction_hash':'size', 'transaction_amount':'sum'})
 ```