diff --git a/Gemfile b/Gemfile
index 59df67b..a923525 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,6 +1,6 @@
 source 'http://rubygems.org'
 
-ruby '2.6.6'
+# ruby '2.6.5'
 
 gem 'rake'
 
diff --git a/Gemfile.lock b/Gemfile.lock
index 4dd4a62..0d6fcce 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -23,8 +23,5 @@ DEPENDENCIES
   minitest-skip
   rake
 
-RUBY VERSION
-   ruby 2.6.5p114
-
 BUNDLED WITH
    2.1.4
diff --git a/lib/.idea/.gitignore b/lib/.idea/.gitignore
new file mode 100644
index 0000000..8bf4d45
--- /dev/null
+++ b/lib/.idea/.gitignore
@@ -0,0 +1,6 @@
+# Default ignored files
+/shelf/
+/workspace.xml
+# Datasource local storage ignored files
+/dataSources/
+/dataSources.local.xml
diff --git a/lib/.idea/inspectionProfiles/Project_Default.xml b/lib/.idea/inspectionProfiles/Project_Default.xml
new file mode 100644
index 0000000..b0db9b0
--- /dev/null
+++ b/lib/.idea/inspectionProfiles/Project_Default.xml
@@ -0,0 +1,6 @@
+<component name="InspectionProjectProfileManager">
+  <profile version="1.0">
+    <option name="myName" value="Project Default" />
+    <inspection_tool class="Rubocop" enabled="false" level="WARNING" enabled_by_default="false" />
+  </profile>
+</component>
\ No newline at end of file
diff --git a/lib/.idea/lib.iml b/lib/.idea/lib.iml
new file mode 100644
index 0000000..6e7c09c
--- /dev/null
+++ b/lib/.idea/lib.iml
@@ -0,0 +1,15 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module type="RUBY_MODULE" version="4">
+  <component name="ModuleRunConfigurationManager">
+    <shared />
+  </component>
+  <component name="NewModuleRootManager">
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$/features" isTestSource="true" />
+      <sourceFolder url="file://$MODULE_DIR$/spec" isTestSource="true" />
+      <sourceFolder url="file://$MODULE_DIR$/test" isTestSource="true" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>
\ No newline at end of file
diff --git a/lib/.idea/misc.xml b/lib/.idea/misc.xml
new file mode 100644
index 0000000..15ffe97
--- /dev/null
+++ b/lib/.idea/misc.xml
@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectRootManager" version="2" project-jdk-name="rbenv: 2.5.5" project-jdk-type="RUBY_SDK" />
+</project>
\ No newline at end of file
diff --git a/lib/.idea/modules.xml b/lib/.idea/modules.xml
new file mode 100644
index 0000000..b0c4ff6
--- /dev/null
+++ b/lib/.idea/modules.xml
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectModuleManager">
+    <modules>
+      <module fileurl="file://$PROJECT_DIR$/.idea/lib.iml" filepath="$PROJECT_DIR$/.idea/lib.iml" />
+    </modules>
+  </component>
+</project>
\ No newline at end of file
diff --git a/lib/.idea/vcs.xml b/lib/.idea/vcs.xml
new file mode 100644
index 0000000..6c0b863
--- /dev/null
+++ b/lib/.idea/vcs.xml
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="$PROJECT_DIR$/.." vcs="Git" />
+  </component>
+</project>
\ No newline at end of file
diff --git a/lib/binary_to_decimal.rb b/lib/binary_to_decimal.rb
index 439e8c6..5dd5a72 100644
--- a/lib/binary_to_decimal.rb
+++ b/lib/binary_to_decimal.rb
@@ -4,6 +4,20 @@
 # The least significant bit is at index 7.
 # Calculate  and return the decimal value for this binary number using
 # the algorithm you devised in class.
+
 def binary_to_decimal(binary_array)
+  sum_of_digits = 0
+  power_of_digit = 7
+  binary_array.each do |digit|
+  sum_of_digits += digit * (2**power_of_digit)
+  power_of_digit -= 1
+  end
+  return sum_of_digits
   raise NotImplementedError
 end
+
+puts binary_to_decimal([0, 0, 0, 0, 0, 0, 0, 0])
+puts binary_to_decimal([0, 0, 0, 0, 0, 0, 0, 1])
+puts binary_to_decimal([1, 0, 0, 0, 0, 0, 0, 1])
+puts binary_to_decimal([0, 0, 0, 0, 0, 0, 1, 1])
+