fix first bill amount less than actual sales

Gemfile.lock

@@ -47,7 +47,7 @@ GEM
       minitest (~> 5.1)
       tzinfo (~> 1.1)
     aescrypt (1.0.0)
-    airbrussh (1.3.3)
+    airbrussh (1.3.4)
       sshkit (>= 1.6.1, != 1.7.0)
     arel (8.0.0)
     axlsx (2.0.1)
@@ -92,14 +92,14 @@ GEM
     cups (0.1.10)
     database_cleaner (1.7.0)
     diff-lcs (1.3)
-    erubi (1.8.0)
+    erubi (1.9.0)
     execjs (2.7.0)
     factory_girl (4.9.0)
       activesupport (>= 3.0.0)
     factory_girl_rails (4.9.0)
       factory_girl (~> 4.9.0)
       railties (>= 3.0.0)
-    faker (2.2.2)
+    faker (2.4.0)
       i18n (~> 1.6.0)
     ffi (1.11.1)
     filterrific (5.2.1)
@@ -154,16 +154,16 @@ GEM
     mini_magick (4.9.5)
     mini_mime (1.0.2)
     mini_portile2 (2.4.0)
-    minitest (5.11.3)
+    minitest (5.12.0)
     momentjs-rails (2.20.1)
       railties (>= 3.1)
     multi_xml (0.6.0)
-    mysql2 (0.4.10)
+    mysql2 (0.5.2)
     nested_form (0.3.2)
     net-scp (2.0.0)
       net-ssh (>= 2.6.5, < 6.0.0)
     net-ssh (5.2.0)
-    nio4r (2.5.1)
+    nio4r (2.5.2)
     nokogiri (1.10.4)
       mini_portile2 (~> 2.4.0)
     pdf-core (0.7.0)
@@ -219,8 +219,10 @@ GEM
       nokogiri
       rubyzip
       spreadsheet (> 0.6.4)
-    rqrcode (0.10.1)
+    rqrcode (1.1.1)
       chunky_png (~> 1.0)
+      rqrcode_core (~> 0.1.0)
+    rqrcode_core (0.1.0)
     rspec-core (3.8.2)
       rspec-support (~> 3.8.0)
     rspec-expectations (3.8.4)
@@ -283,16 +285,16 @@ GEM
       rails (>= 3.1)
     thor (0.20.3)
     thread_safe (0.3.6)
-    tilt (2.0.9)
+    tilt (2.0.10)
     to_xls-rails (1.3.1)
       spreadsheet (>= 0.8.5)
     ttfunk (1.5.1)
-    turbolinks (5.2.0)
+    turbolinks (5.2.1)
       turbolinks-source (~> 5.2)
     turbolinks-source (5.2.0)
     tzinfo (1.2.5)
       thread_safe (~> 0.1)
-    uglifier (4.1.20)
+    uglifier (4.2.0)
       execjs (>= 0.3.0, < 3)
     web-console (3.7.0)
       actionview (>= 5.0)
@@ -338,7 +340,7 @@ DEPENDENCIES
   material_icons
   mini_magick
   momentjs-rails
-  mysql2 (>= 0.3.18, < 0.5)
+  mysql2
   nested_form
   pdfjs_viewer-rails
   pg