diff --git a/import2ledger/importers/nbpy2017.py b/import2ledger/importers/nbpy2017.py
index 31927c2..0e5f89c 100644
--- a/import2ledger/importers/nbpy2017.py
+++ b/import2ledger/importers/nbpy2017.py
@@ -82,14 +82,17 @@ class Invoice2017:
         self.shirts_sold = decimal.Decimal(0)
         self.shirt_rate = self.STANDARD_SHIRT_RATE
         for description, qty, unit_price, total in rows_text:
+            if qty is None:
+                continue
+            total = strparse.currency_decimal(total)
+            self.amount += total
             if description.startswith('Ticket - '):
-                self.tickets_sold += 1
+                if total > 0:
+                    self.tickets_sold += 1
             elif description.startswith('T-Shirt - '):
                 self.shirts_sold += 1
             elif description.startswith('Early Bird ('):
                 self.ticket_rate = self.DISCOUNT_TICKET_RATE
-            if qty:
-                self.amount += strparse.currency_decimal(total)
 
     def _read_invoice_activity(self, table, first_row_text, rows_text):
         self.actions = [{
diff --git a/tests/data/imports.yml b/tests/data/imports.yml
index 41dd760..f3bfc27 100644
--- a/tests/data/imports.yml
+++ b/tests/data/imports.yml
@@ -238,9 +238,9 @@
     - payee: Python Person C
       ledger template: nbpy2017 invoice ledger entry
       date: !!python/object/apply:datetime.date [2017, 9, 5]
-      amount: !!python/object/apply:decimal.Decimal ["55.00"]
-      tickets_sold: !!python/object/apply:decimal.Decimal ["1"]
-      ticket_rate: !!python/object/apply:decimal.Decimal ["21.25"]
+      amount: !!python/object/apply:decimal.Decimal ["30.00"]
+      tickets_sold: !!python/object/apply:decimal.Decimal ["0"]
+      ticket_rate: !!python/object/apply:decimal.Decimal ["42.50"]
       shirts_sold: !!python/object/apply:decimal.Decimal ["1"]
       shirt_rate: !!python/object/apply:decimal.Decimal ["25.50"]
       status: Invoice
@@ -250,9 +250,9 @@
     - payee: Python Person C
       ledger template: nbpy2017 payment ledger entry
       date: !!python/object/apply:datetime.date [2017, 9, 5]
-      amount: !!python/object/apply:decimal.Decimal ["55.00"]
-      tickets_sold: !!python/object/apply:decimal.Decimal ["1"]
-      ticket_rate: !!python/object/apply:decimal.Decimal ["21.25"]
+      amount: !!python/object/apply:decimal.Decimal ["30.00"]
+      tickets_sold: !!python/object/apply:decimal.Decimal ["0"]
+      ticket_rate: !!python/object/apply:decimal.Decimal ["42.50"]
       shirts_sold: !!python/object/apply:decimal.Decimal ["1"]
       shirt_rate: !!python/object/apply:decimal.Decimal ["25.50"]
       status: Payment
diff --git a/tests/data/nbpy2017c.html b/tests/data/nbpy2017c.html
index fb7ed95..cc61c3a 100644
--- a/tests/data/nbpy2017c.html
+++ b/tests/data/nbpy2017c.html
@@ -172,10 +172,10 @@
           <th class="text-right">Total</th>
         </tr>
           <tr>
-            <td>Ticket - Unaffiliated Individual</td>
+            <td>Ticket - Talk Proposer</td>
             <td class="text-right">1</td>
-            <td class="text-right">$50.00</td>
-            <td class="text-right">$50.00</td>
+            <td class="text-right">$0.00</td>
+            <td class="text-right">$0.00</td>
           </tr>
           <tr>
             <td>T-Shirt - Men&#39;s/Straight Cut Size M</td>
@@ -184,18 +184,18 @@
             <td class="text-right">$30.00</td>
           </tr>
           <tr>
-            <td>Early Bird (Ticket - Unaffiliated Individual)</td>
+            <td>Tutorials - Notify me when tutorials are open</td>
             <td class="text-right">1</td>
-            <td class="text-right">$-25.00</td>
-            <td class="text-right">$-25.00</td>
+            <td class="text-right">$-0.00</td>
+            <td class="text-right">$-0.00</td>
           </tr>
         <tr>
           <th colspan="3">TOTAL</th>
-          <td class="text-right">$55.00</td>
+          <td class="text-right">$30.00</td>
         </tr>
     <tr>
       <td colspan="3">Includes donation eligible for tax deduction in the USA:</td>
-      <td class="text-right">$8.25</td>
+      <td class="text-right">$4.25</td>
     </tr>
       </table>
     </div>
@@ -210,7 +210,7 @@
         </tr>
         <tr>
           <td colspan="3">Balance due:</td>
-          <td class="text-right">$55.00</td>
+          <td class="text-right">$30.00</td>
         </tr>
       </table>
     </div>
@@ -227,12 +227,12 @@
       <tr>
         <td>Sept. 5, 2017, 9:14 p.m.</td>
         <td>Paid with Stripe reference: ch_daer0ahwoh9oDeiqu2eimoD7</td>
-        <td>55.00</td>
+        <td>30.00</td>
       </tr>
       <tr>
         <td>Sept. 8, 2017, 3:20 p.m.</td>
         <td>Generated credit note 31</td>
-        <td>-55.00</td>
+        <td>-30.00</td>
       </tr>
   </table>
       </div>