diff --git a/docs/build/doctrees/4_calculating-gross-pay.doctree b/docs/build/doctrees/4_calculating-gross-pay.doctree
index a267720..dd71b79 100644
Binary files a/docs/build/doctrees/4_calculating-gross-pay.doctree and b/docs/build/doctrees/4_calculating-gross-pay.doctree differ
diff --git a/docs/build/doctrees/environment.pickle b/docs/build/doctrees/environment.pickle
index 6ad0338..3dd21a7 100644
Binary files a/docs/build/doctrees/environment.pickle and b/docs/build/doctrees/environment.pickle differ
diff --git a/docs/build/simplepdf/.buildinfo b/docs/build/simplepdf/.buildinfo
index 99088b8..d3ee8ab 100644
--- a/docs/build/simplepdf/.buildinfo
+++ b/docs/build/simplepdf/.buildinfo
@@ -1,4 +1,4 @@
 # Sphinx build info version 1
 # This file records the configuration used when building these files. When it is not found, a full rebuild will be done.
-config: ddffe0697440b1ecf23fb3af6df8f583
+config: 05d274dfeceff172865c3e91eb4674ea
 tags: 62a1e7829a13fc7881b6498c52484ec0
diff --git a/docs/build/simplepdf/index.html b/docs/build/simplepdf/index.html
index 144ebf0..6e3e7e5 100644
--- a/docs/build/simplepdf/index.html
+++ b/docs/build/simplepdf/index.html
@@ -316,9 +316,21 @@
        </ul>
       </li>
       <li class="toctree-l1">
-       <a class="reference internal" href="#introduction-to-canadian-payroll">
-        4. INTRODUCTION TO CANADIAN PAYROLL
+       <a class="reference internal" href="#calculating-gross-pay">
+        4. CALCULATING GROSS PAY
        </a>
+       <ul>
+        <li class="toctree-l2">
+         <a class="reference internal" href="#regular-earnings">
+          4.1. Regular Earnings
+         </a>
+        </li>
+        <li class="toctree-l2">
+         <a class="reference internal" href="#irregular-earnings">
+          4.2. Irregular Earnings
+         </a>
+        </li>
+       </ul>
       </li>
       <li class="toctree-l1">
        <a class="reference internal" href="#canada-pension-plan">
@@ -3665,13 +3677,29 @@ morning at 10:00 to discuss?
        </section>
        <span id="document-4_calculating-gross-pay">
        </span>
-       <section id="introduction-to-canadian-payroll">
+       <section id="calculating-gross-pay">
         <h1>
-         INTRODUCTION TO CANADIAN PAYROLL
-         <a class="headerlink" href="#introduction-to-canadian-payroll" title="Link to this heading">
+         CALCULATING GROSS PAY
+         <a class="headerlink" href="#calculating-gross-pay" title="Link to this heading">
           &para;
          </a>
         </h1>
+        <section id="regular-earnings">
+         <h2>
+          Regular Earnings
+          <a class="headerlink" href="#regular-earnings" title="Link to this heading">
+           &para;
+          </a>
+         </h2>
+        </section>
+        <section id="irregular-earnings">
+         <h2>
+          Irregular Earnings
+          <a class="headerlink" href="#irregular-earnings" title="Link to this heading">
+           &para;
+          </a>
+         </h2>
+        </section>
        </section>
        <span id="document-cpp-and-ei">
        </span>
diff --git a/docs/build/simplepdf/objects.inv b/docs/build/simplepdf/objects.inv
index 04d2df6..1db4a37 100644
Binary files a/docs/build/simplepdf/objects.inv and b/docs/build/simplepdf/objects.inv differ
diff --git a/docs/source/4_calculating-gross-pay.rst b/docs/source/4_calculating-gross-pay.rst
index 3a96cf5..cbba45a 100644
--- a/docs/source/4_calculating-gross-pay.rst
+++ b/docs/source/4_calculating-gross-pay.rst
@@ -1,3 +1,9 @@
 ####################################
-INTRODUCTION TO CANADIAN PAYROLL
-####################################
\ No newline at end of file
+CALCULATING GROSS PAY
+####################################
+
+Regular Earnings
+-----------------------------------
+
+Irregular Earnings
+-----------------------------------
\ No newline at end of file