diff --git a/.gitignore b/.gitignore
index f40ad1d..8b9798a 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,4 +1,4 @@
-/src/examples.clj
+/private/
 /.cpcache/
 /target/
 /.nrepl-port
diff --git a/README.md b/README.md
index 7e9e7bd..da61be6 100644
--- a/README.md
+++ b/README.md
@@ -7,13 +7,19 @@ intricate Beancount bookkeeping data.
 
 ## Usage
 
-Run with:
+See a demo with:
 
-    java -jar import-0.0.8-standalone.jar --csv resources/example-paychex-pay-item-details.csv --date 2023-12-29 --period 'December 2023' --total-fees 206.50 --pay-receipt-no rt:19462/674660 --pay-invoice-no rt:19403/675431 --fees-receipt-no rt:19459/675387 --fees-invoice-no rt:19459/674887 --retirement-receipt-no rt:19403/676724 --retirement-invoice-no rt:19403/675431
+    java -jar import-x.x.x-standalone.jar --demo
 
-Or simpler (missing options will be replaced by "TODO" in the output):
+Provide your own payroll data with:
 
-    java -jar import-0.0.8-standalone.jar --csv resources/example-paychex-pay-item-details.csv --total-fees 206.50
+    java -jar import-x.x.x-standalone.jar --csv resources/example-paychex-pay-item-details.csv --total-fees 206.50
+
+In the above, various values such as the date, time period covered and
+receipt/invoice values will be replace with "TODO" placeholders. You can
+alternatively provide any/all of these explicitly:
+
+    java -jar import-x.x.x-standalone.jar --csv resources/example-paychex-pay-item-details.csv --date 2023-12-29 --period 'December 2023' --total-fees 206.50 --pay-receipt-no rt:19462/674660 --pay-invoice-no rt:19403/675431 --fees-receipt-no rt:19459/675387 --fees-invoice-no rt:19459/674887 --retirement-receipt-no rt:19403/676724 --retirement-invoice-no rt:19403/675431
 
 You can test the output in Beancount by adding the following header entries to define the accounts:
 
diff --git a/build.clj b/build.clj
index df2a795..a313f8c 100644
--- a/build.clj
+++ b/build.clj
@@ -14,7 +14,9 @@
 
 (defn uber [_]
   (clean nil)
-  (b/copy-dir {:src-dirs ["src"]
+  (b/copy-dir {:src-dirs ["src" "resources"]
+               :target-dir class-dir})
+  (b/copy-dir {:src-dirs ["src" "resources"]
                :target-dir class-dir})
   (b/compile-clj {:basis @basis
                   :ns-compile '[core]
diff --git a/deps.edn b/deps.edn
index bb96f00..8663d9e 100644
--- a/deps.edn
+++ b/deps.edn
@@ -1,4 +1,4 @@
-{:paths ["src" "resources"]
+{:paths ["src" "resources" "private"]  ;; Private is not include in the build
  :deps {
         org.clojure/clojure {:mvn/version "1.11.1"}
         org.clojure/data.csv {:mvn/version "1.0.1"}
diff --git a/src/core.clj b/src/core.clj
index e47b7fd..0b4d91c 100644
--- a/src/core.clj
+++ b/src/core.clj
@@ -3,7 +3,8 @@
 
 (ns core
   "Beancount importer for Paychex Pay Item Details report."
-  (:require [clojure.set :as set]
+  (:require [clojure.java.io :as io]
+            [clojure.set :as set]
             [clojure.string :as str]
             [clojure.tools.cli :refer [parse-opts]]
             [import :as import])
@@ -37,6 +38,7 @@
     :parse-fn #(str/split % #":")
     :default {}
     :assoc-fn (fn [m k [name proj]] (assoc-in m [k name] proj))]
+   [nil "--demo" "Produce demo output based made-up payroll data. Useful for documentation."]
    ["-h" "--help"]])
 
 (defn unmatched-employees
@@ -44,9 +46,15 @@
    [records projects]
   (set/difference (set (keys projects)) (->> records (map :name) set)))
 
+(def demo-options
+  {:csv (io/resource "example-paychex-pay-item-details.csv")
+   :date "2024-01-01"
+   :period "January 2024"
+   :total-fees 66.67M})
+
 (defn -main [& args]
   (let [{:keys [options errors summary]} (parse-opts args cli-options)
-        {:keys [date period pay-receipt-no pay-invoice-no total-fees fees-receipt-no fees-invoice-no retirement-receipt-no retirement-invoice-no project]} options]
+        options (if (:demo options) (merge options demo-options) options)]
     (when (:help options)
       (println summary)
       (System/exit 0))
@@ -55,12 +63,14 @@
        (str "The following errors occurred while parsing your command:\n\n"
             (str/join \newline errors)))
       (System/exit 1))
-    (let [records (import/read-csv (:csv options))
+    (let [{:keys [date period pay-receipt-no pay-invoice-no total-fees project]} options
+          {:keys [fees-receipt-no fees-invoice-no retirement-receipt-no retirement-invoice-no]} options
+          records (import/read-csv (:csv options))
           imported (concat (import/net-pay date period pay-invoice-no project records)
                            (import/individual-taxes date period pay-invoice-no retirement-invoice-no project records)
                            (import/employer-taxes date period pay-invoice-no project records)
-                           (import/net-pay-ach-debit date period pay-receipt-no pay-invoice-no {} records)
-                           (import/taxes-ach-debit date period pay-receipt-no pay-invoice-no {} records)
+                           (import/net-pay-ach-debit date period pay-receipt-no pay-invoice-no project records)
+                           (import/taxes-ach-debit date period pay-receipt-no pay-invoice-no project records)
                            (import/fees date period fees-receipt-no fees-invoice-no total-fees project records)
                            (import/retirement date period retirement-receipt-no retirement-invoice-no records))
           unmatched (unmatched-employees records project)]