Bulk prices and break downs

I buy in bulk a lot, and that makes prices tricky sometimes because once you have a gallon of olive oil who really remembers what you paid for it.  So here is a running list of ingredients, prices and break downs for when I do my prices.

Olive oil	I Gal	252 tbsp	$20
flour	25 lbs	100 cups	7.29
sugar	5lbs	11.25 cups	2.79
Butter	1 lb	32 tbsp	1.99
rice	5lb	12.5 cups	3.50