Ask for number of builders.

calculate.js

@@ -1,6 +1,6 @@
 "use strict";
 //Licensed under the Apache License 2.0. See license file for information.
-// Ardon Income Calculator v3.6 stable.
+// Ardon Income Calculator v3.7 stable.
 // Written by Josh Mudge
 // Ad Mejorem Dei Glorium
 

index.html

@@ -16,6 +16,10 @@ Enter the number of soldiers you have. (upkeep cost of 50 gold/year)
 <br><br>
 <input type="number" id="soldiers"></input>
 <br><br><br><br>
+Enter the number of builders you have. (upkeep cost of 50 gold/year)
+<br><br>
+<input type="number" id="builders"></input>
+<br><br><br><br>
 Enter the number of blocks used for transportation, farmland, recreational purposes, soft infrastructure or utilities that is not buildings. (0.25% bonus per 1000 blocks)
 <br><br>
 <input type="number" id="infra"></input>