Adding Bonus or Free Items given by supplier

Adding Bonus Items or Free items given by Suppliers 

 2 ways you can do this: 

 Solution 1: 

 When adding purchases simply  make purchase price 0  for the free items. 

   

 Solution 2: 

 Find the average price of the item and use that for unit price. 

 for example, if you purchase 10 quantity for a price of $2 each, 10X2 = $20