diff -r 99dcd8488b62 -r c2d42c5ae51b www/js/prod_edit.js
--- a/www/js/prod_edit.js	Sun Jun 30 13:18:36 2019 +0200
+++ b/www/js/prod_edit.js	Sun Jun 30 13:56:06 2019 +0200
@@ -211,7 +211,7 @@
 				}
 				d = parseFloat(dataRecord.efficiency) / 100 * d;
 				sugarsm += d;
-				mashkg += row.f_amount;
+				mashkg += parseFloat(row.f_amount);
 			}
 			if (row.f_added == 0 || row.f_added == 1)	// Mash or Boil
 				sugarsf += d;