Unit selection for previous year production comparison report. Table done, graphic needs work.

config/Reports/chart.xml

             <calendar id="enddate" />
             <label>Days to Average</label>
             <line validator="integer" id="days">7</line>
+			<label>Weight Unit:</label>
+			<sqldrop id="unit" />
             <stretch />
         </layout>
         <webview id="report" />
                 view.print();
             });
             var avgField = findChildObject(this, 'days');
+			unitBox.addItem("Kg");
+			unitBox.addItem("Lb");
+			unitBox.currentIndex = QSettings.value("script/report_unit", 1);
+			unitBox['currentIndexChanged(int)'].connect(function() {
+				QSettings.setValue("script/report_unit", unitBox.currentIndex);
+				refresh();
+			});
             function refresh() {
+				var conversion = 1;
+				if(unitBox.currentIndex == 0) {
+					conversion = 2.2;
+				}
                 var buffer = new QBuffer;
                 buffer.open(3);
                 var output = new XmlWriter(buffer);
                 output.writeStartElement("thead");
                 output.writeStartElement("tr");
                 output.writeTextElement("th", "Coffee");
-                output.writeTextElement("th", "Previous");
-                output.writeTextElement("th", "Current");
-                output.writeTextElement("th", "Change");
+				switch(unitBox.currentIndex) {
+					case 0:
+						output.writeTextElement("th", "Previous (Kg)");
+						output.writeTextElement("th", "Current (Kg)");
+						output.writeTextElement("th", "Change (Kg)");
+						break;
+					case 1:
+						output.writeTextElement("th", "Previous (Lb)");
+						output.writeTextElement("th", "Current (Lb)");
+						output.writeTextElement("th", "Change (Lb)");
+						break;
+				}
                 output.writeEndElement();
                 output.writeEndElement();
                 output.writeStartElement("tbody");
                 var query = new QSqlQuery();
                 query.exec("START TRANSACTION");
-                print(query.executedQuery());
                 var curStartDate = "'"+startDateField.year()+"-"+startDateField.month()+"-"+startDateField.day()+"'";
                 query.exec("SELECT "+curStartDate+"::date - interval '1 year', '"+endDateField.year()+"-"+endDateField.month()+"-"+endDateField.day()+"'::date - interval '1 year' + interval '1 day', '"+endDateField.year()+"-"+endDateField.month()+"-"+endDateField.day()+"'::date + interval '1 day'");
-                print(query.executedQuery());
                 query.next();
                 var curEndDate = "'"+query.value(2)+"'";
                 var prevStartDate = "'"+query.value(0)+"'";
                 var prevEndDate = "'"+query.value(1)+"'";
                 var q = "CREATE TEMPORARY TABLE previous ON COMMIT DROP AS SELECT roasted_id, sum(roasted_quantity) AS p FROM roasting_log WHERE time > "+prevStartDate+" AND time < "+prevEndDate+" AND roasted_id IS NOT NULL GROUP BY roasted_id";
                 query.exec(q);
-                print(query.executedQuery());
                 q = "CREATE TEMPORARY TABLE current ON COMMIT DROP AS SELECT roasted_id, sum(roasted_quantity) AS c FROM roasting_log WHERE time > "+curStartDate+" AND time < "+curEndDate+" AND roasted_id IS NOT NULL GROUP BY roasted_id";
                 query.exec(q);
-                print(query.executedQuery());
                 query.exec("INSERT INTO previous SELECT roasted_id, 0 FROM current WHERE roasted_id NOT IN (SELECT roasted_id FROM previous)");
-                print(query.executedQuery());
                 query.exec("INSERT INTO current SELECT roasted_id, 0 FROM previous WHERE roasted_id NOT IN (SELECT roasted_id FROM current)");
-                print(query.executedQuery());
                 query.exec("CREATE TEMPORARY TABLE comp ON COMMIT DROP AS SELECT previous.roasted_id, p, c FROM previous LEFT OUTER JOIN current ON previous.roasted_id = current.roasted_id");
-                print(query.executedQuery());
                 query.exec("SELECT (SELECT name FROM items WHERE id = roasted_id) AS name, p, c, (c-p) FROM comp WHERE p > 0 OR c > 0 ORDER BY name");
-                print(query.executedQuery());
                 while(query.next())
                 {
                     output.writeStartElement("tr");
                     output.writeTextElement("td", query.value(0));
-                    output.writeTextElement("td", query.value(1));
-                    output.writeTextElement("td", query.value(2));
-                    output.writeTextElement("td", query.value(3));
+					output.writeTextElement("td", query.value(1) / conversion);
+					output.writeTextElement("td", query.value(2) / conversion);
+					output.writeTextElement("td", query.value(3) / conversion);
                     output.writeEndElement();
                 }
                 output.writeEndElement();
                 output.writeStartElement("tfoot");
                 output.writeTextElement("th", "Totals");
                 query.exec("SELECT sum(p), sum(c), sum(c-p) FROM comp");
-                print(query.executedQuery());
                 query.next();
-                output.writeTextElement("td", query.value(0));
-                output.writeTextElement("td", query.value(1));
-                output.writeTextElement("td", query.value(2));
+				output.writeTextElement("td", query.value(0) / conversion);
+				output.writeTextElement("td", query.value(1) / conversion);
+				output.writeTextElement("td", query.value(2) / conversion);
                 output.writeEndElement();
                 query.exec("ABORT");
-                print(query.executedQuery());
                 output.writeEndElement();
                 output.writeStartElement("svg");
                 output.writeAttribute("xmlns", "http://www.w3.org/2000/svg");