Reuse the calculated contributions of each building when displaying stats

gorge.js

@@ -1055,10 +1055,10 @@ function prodSummary(id) {
   );
 
   list.push(
-    { "text": "Your " + render(belongings[id].count) + " " + (belongings[id].count == 1 ? buildings[id].name + " is" : buildings[id].plural + " are") + " producing " + round(productivityOf(id).food, 1) + " food/sec" }
+    { "text": "Your " + render(belongings[id].count) + " " + (belongings[id].count == 1 ? buildings[id].name + " is" : buildings[id].plural + " are") + " producing " + round(contributions[id].food, 1) + " food/sec" }
   );
 
-  let percentage = round(100 * productivityOf(id).food / currentProductivity["food"], 2);
+  let percentage = round(100 * contributions[id].food / currentProductivity["food"], 2);
 
   if (isNaN(percentage)) {
     percentage = 0;