diff --git a/app/models/hourly_deliverable.rb b/app/models/hourly_deliverable.rb
index 84b82f9..e466cdd 100644
--- a/app/models/hourly_deliverable.rb
+++ b/app/models/hourly_deliverable.rb
@@ -35,6 +35,7 @@ class HourlyDeliverable < Deliverable
     if read_attribute(:profit_percent).nil?
       return super
     else
+      return 0.0 if read_attribute(:cost_per_hour).nil? || read_attribute(:total_hours).nil?
       labor = (read_attribute(:cost_per_hour) * read_attribute(:total_hours))
       
       return (read_attribute(:profit_percent).to_f / 100.0) * (labor + self.overhead)